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5 values
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6
18
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stringlengths
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1.92k
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stringclasses
5 values
aqua_train
aqua_train_46465
A can complete a project in 20 days while B can complete same project in 30 days. If A and B start working together and A leaves the work 10 days before completion of project, then in how many days the project will be completed?
[ "A)15", "B)16", "C)17", "D)18", "E)19" ]
D
aqua_train
aqua_train_55922
A circular mat with diameter 3.5 inches is placed on a square tabletop, each of whose sides is 6 inches long. Which of the following is closest to the fraction of the tabletop covered by the mat?
[ "A)2", "B)1", "C)3", "D)4", "E)5" ]
B
aqua_train
aqua_train_63136
If the price of sugar rises from Rs. 3 per kg to Rs. 5 per kg, a person, to have no increase in the expenditure on sugar, will have to reduce his consumption of sugar by
[ "A)15%", "B)20%", "C)25%", "D)30%", "E)40%" ]
E
science_train
science_train_2475
Question: Identify the question that Kurt's experiment can best answer. Hints:
[ "Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?", "Does temperature affect how much bacteria can grow in liquid?" ]
A
aqua_train
aqua_train_2365
Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time which they take to cross each other is?
[ "A)10.9 sec", "B)14.8 sec", "C)10.6 sec", "D)10.8 sec", "E)20.8 sec" ]
D
aqua_train
aqua_train_57136
Karthik read 7/13 th of a book in 1st week and 5/9 th of the remaining book in 2nd week. If there were 96 pages unread after 2nd week, how many pages were there in the book ?
[ "A)518", "B)452", "C)468", "D)502", "E)396" ]
C
aqua_train
aqua_train_37124
If 40% of a number is equal to two-third of another number, what is the ratio of first number to the second number?
[ "A)5:9", "B)5:5", "C)5:3", "D)5:2", "E)5:1" ]
C
aqua_train
aqua_train_17239
5n + 2 > 12 and 7n - 12 < 44; n must be between which numbers?
[ "A)2 and 8", "B)2 and 6", "C)0 and 9", "D)2 and 7", "E)2 and 9" ]
A
aqua_train
aqua_train_38151
How much time will it take for an amount of 1000 to yield 100 as interest at 5% per annum of simple interest?
[ "A)3 years", "B)4 years", "C)2 years", "D)5 years", "E)7 years" ]
C
aqua_train
aqua_train_21850
The compound interest earned by Sunil on a certain amount at the end of two years at the rate of 8% p.a. was Rs.2828.80. Find the total amount that Sunil got back at the end of two years in the form of principal plus interest earned?
[ "A)Rs.19,928.80", "B)Rs.19,828.80", "C)Rs.19,898.80", "D)Rs.19,588.80", "E)Rs.19,899.80" ]
B
sciq
sciq_4
Besides depth soundings, what else are bathymetric maps made of?
[ "intensity data", "solar data", "density measures", "sonar data" ]
D
aqua_train
aqua_train_58971
You collect coins. Suppose you start out with 18. Since you're nice, you give Sharon 3 coins. Since you're nice, you give Steven 4 coins. How many coins do you have at the end?
[ "A)2", "B)3", "C)4", "D)5", "E)11" ]
E
aqua_train
aqua_train_85899
A rower can row upstream at 15 kph and downstream at 30 kph. What is the speed of the rower in still water?
[ "A)20.9", "B)21.3", "C)21.7", "D)22.1", "E)22.5" ]
E
ds_train
ds_train_1873
In behavioral ecology, the phenomenon where individual members of a species align their behavior with that of the majority to benefit from collective actions, such as protection from predators or increased foraging success, is known as which of the following?
[ "A. Altruism\nB. Herding\nC. Kin selection\nD. Territoriality" ]
B
aqua_train
aqua_train_48686
(1+0.0001)/(0.04+100) The value of the expression above is closet to which of the following?
[ "A)0.0001", "B)0.01", "C)0.1", "D)1", "E)10" ]
B
sciq
sciq_4
The lighter photic zone and darker aphotic zone are determined by what?
[ "water reflection", "water shape", "water density", "water depth" ]
D
aqua_train
aqua_train_57133
A newly-wed couple is using a website to design an eBook Wedding Album to distribute to their friends and families. The template they have chosen has places for 3 large photos and 19 smaller photos. The couple has 7 large photos they could use for those three slots, and 21 smaller photos they could use for those 19 slo...
[ "A)3,150", "B)4,200", "C)7350", "D)20,520", "E)84,000" ]
C
aqua_train
aqua_train_440
What is the CP of Rs 100 stock at 2 discount, with 1/5% brokerage?
[ "A)99.6", "B)96.2", "C)97.5", "D)98.2", "E)None of these" ]
D
aqua_train
aqua_train_80916
How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6.6 m x 22.5 cm?
[ "A)6400", "B)6410", "C)6440", "D)6500", "E)7040" ]
E
aqua_train
aqua_train_5927
Incomes of two companies A and B are in the ratio of 5 : 8. Had the income of company A been more by 30 lakh, the ratio of their incomes would have been 5 : 4. What is the income of company B?
[ "A)80 lakh", "B)50 lakh", "C)48 lakh", "D)60 lakh", "E)None of these" ]
C
aqua_train
aqua_train_46532
Of the 170 people at a party, 70 were women, and 30 women tried the appetizer. If 60 people did not try the appetizer, what is the total number of men who tried the appetizer?
[ "A)40", "B)50", "C)60", "D)70", "E)80" ]
E
science_train
science_train_3944
Question: Identify the question that Jaylen's experiment can best answer. Hints:
[ "Do more bacteria grow in liquid with cinnamon than in liquid without cinnamon?", "Does temperature affect how much bacteria can grow in liquid?" ]
A
sciq
sciq_4
What are the active transport mechanisms by which molecules enter and leave the cell inside vesicles?
[ "endocytosis and oxidation", "oxidation and exocytosis", "dielectric and exocytosis", "endocytosis and exocytosis" ]
D
aqua_train
aqua_train_21334
The ages of two persons differ by 16 years. 3 years ago, the elder one was 3 times as old as the younger one. What are their present ages of the elder person
[ "A)15", "B)20", "C)25", "D)27", "E)35" ]
D
aqua_train
aqua_train_62628
A started a business with an investment of Rs. 70000 and after 6 months B joined him investing Rs. 120000. If the profit at the end of a year is Rs. 52000, then the share of B is?
[ "A)24008", "B)24000", "C)24005", "D)24009", "E)24002" ]
B
aqua_train
aqua_train_40747
A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr. His average speed for the whole journey in km/hr is?
[ "A)37.9", "B)37.2", "C)37.5", "D)37.1", "E)37.8" ]
C
aqua_train
aqua_train_69891
Matt is touring a nation in which coins are issued in two amounts, 2¢ and 5¢, which are made of iron and copper, respectively. If Matt has twuenty iron coins and thuenty copper coins, how many different sums from 1¢ to 140¢ can he make with a combination of his coins?
[ "A)137", "B)140", "C)166", "D)136", "E)2" ]
D
aqua_train
aqua_train_56435
A train 280 m long, running with a speed of 63 km/hr will pass a tree in?
[ "A)21", "B)16", "C)18", "D)12", "E)112" ]
B
sciq
sciq_4
What are important coenzymes or precursors of coenzymes, and are required for enzymes to function properly?
[ "carbohydrates", "supplements", "Drugs", "vitamins" ]
D
aqua_train
aqua_train_30790
Carolina has 1 nickel and 5 pennies in her pocket. If she pulls 2 coins out of her pocket simultaneously and randomly, what is the probability that she will be holding exactly 6 cents?
[ "A)1/3", "B)4/15", "C)5/6", "D)6/10", "E)2/15" ]
A
sciq
sciq_4
When two haploid gametes unite during fertilization they form what?
[ "a mutated cell", "haploid cell", "a fertilized cell", "a diploid cell" ]
D
aqua_train
aqua_train_54418
The ratio of pens to pencils is 5 to 6. There are 8 more pencils than pens. How many pencils are there?
[ "A)30", "B)32", "C)48", "D)55", "E)64" ]
C
aqua_train
aqua_train_88331
What is the value of (12 + 22 + 32 + 42 + ----- + 102)
[ "A)295", "B)324", "C)385", "D)391", "E)399" ]
C
aqua_train
aqua_train_22807
A train passes a station platform in 32 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
[ "A)123", "B)166", "C)240", "D)157", "E)180" ]
E
aqua_train
aqua_train_52880
How many 6 digit telephone numbers can be formed if each number starts with 35 and no digit appears more than once?
[ "A)720", "B)360", "C)1420", "D)1680", "E)None of these" ]
D
aqua_train
aqua_train_53529
One week, a certain truck rental lot had a total of 24 trucks, all of which were on the lot Monday morning. If 50% of the trucks that were rented out during the week were returned to the lot on or before Saturday morning of that week, and if there were at least 12 trucks on the lot that Saturday morning, what is the gr...
[ "A)24", "B)16", "C)12", "D)8", "E)4" ]
A
aqua_train
aqua_train_23915
X and Y run a 100m race,where X beats Y by 20 m. To do a favor to Y, X starts 10m behind the starting line in a second 100m race. Both run at the same previous speed. Which of the following is true?
[ "A)X Beats Y by 2m", "B)X Beats Y by 0.5 m", "C)X Beats Y by 4 m", "D)X Beats Y by 4 m", "E)Y Beats X by 10m" ]
D
aqua_train
aqua_train_15962
Three hundred gallons of fuel are purchased at $0.90 per gallon. The fuel is consumed at a rate of $0.50 worth of fuel per hour. At this rate, how many hours are required to consume the 300 gallons of fuel?
[ "A)510", "B)520", "C)530", "D)540", "E)550" ]
D
aqua_train
aqua_train_59100
If m<0, which of the following represents a positive number?
[ "A)-d|d|", "B)d/ |d|", "C)|d|d", "D)|d|/d", "E)d|d|" ]
A
aqua_train
aqua_train_84574
The length of the bridge, which a train 130 metres long and travelling at 54 km/hr can cross in 30 seconds, is:
[ "A)200 m", "B)225 m", "C)320 m", "D)250 m", "E)240 m" ]
C
science_train
science_train_880
Question: Based on this information, what is Sage's phenotype for the coat pattern trait? Hints:
[ "white spots", "aa" ]
A
aqua_train
aqua_train_40572
If a is a positive integer, and if the units' digit of a^2 is 4 and the units' digit of (a + 1)^2 is 1, what is the units' digit of (a + 2)^2 ?
[ "A)\t0", "B)\t2", "C)\t4", "D)\t6", "E)\t8" ]
A
science_train
science_train_740
Question: Which is smoother? Hints:
[ "burlap sack", "silver ring" ]
B
science_train
science_train_603
Question: What is the expected ratio of offspring with a spotted tail to offspring with an unspotted tail? Choose the most likely ratio. Hints:
[ "0:4", "3:1", "4:0", "2:2", "1:3" ]
D
aqua_train
aqua_train_57834
In one alloy there is 12% chromium while in another alloy it is 8%. 35 kg of the first alloy was melted together with 40 kg of the second one to form a third alloy. Find the percentage of chromium in the new alloy.
[ "A)8.8%", "B)9.75%", "C)9.2%", "D)8.6%", "E)8.4%" ]
B
aqua_train
aqua_train_32523
Which of these must the factor G of the product of four consecutive even integers:- 1) 48 2) 64 3) 96 4) 192 5) 80
[ "A)1,2 only", "B)G=2,3 only", "C)G=1,2,3 only", "D)G=1,2,3,4 only", "E)All of them" ]
D
sciq
sciq_4
How many major forces of elevation cause allele frequencies to change?
[ "one", "five", "three", "four" ]
D
aqua_train
aqua_train_11553
Mrs. Napier has 23 stickers to give to 9 students for a reward. How many stickers will each student get? Will there be any stickers left over?
[ "A)2-5", "B)2-4", "C)2-6", "D)2-3", "E)2-8" ]
A
aqua_train
aqua_train_28330
If Rs.7500 are borrowed at C.I at the rate of 4% per annum, then after 2 years the amount to be paid is?
[ "A)Rs.544", "B)Rs. 8112", "C)Rs.820", "D)Rs.639", "E)Rs.897" ]
B
aqua_train
aqua_train_22378
The ratio of the present ages of Giri and Hari is 5:8. 12 years hence, the ratio of their ages will be 11:14. Find the difference in their present ages?
[ "A)7 years", "B)6 years", "C)9 years", "D)5 years", "E)4 years" ]
B
aqua_train
aqua_train_62834
A watch which gains uniformly ,is 5 min,slow at 8 o'clock in the morning on sunday and it is 5 min 48 sec.fast at 8 p.m on following sunday. when was it correct?
[ "A)20 min past 8pm on wednesday", "B)20 min past 7pm on wednesday", "C)20 min past 6pm on wednesday", "D)20 min past 2pm on wednesday", "E)20 min past 4pm on wednesday" ]
B
aqua_train
aqua_train_76561
If an ant moves a distance x,then turn left 120 degree and travel x distance again and turn right 120 dgree and travel, he is 9 inches from the starting point, what is the value of x?
[ "A)9√9", "B)9√3", "C)9√6", "D)7√3", "E)9√4" ]
B
aqua_train
aqua_train_72362
Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is
[ "A)27", "B)29", "C)12", "D)11", "E)Cannot be determined" ]
E
science_train
science_train_5722
Question: Look at the models of molecules below. Select the elementary substance. Hints:
[ "tetraphosphorus", "carbon tetraiodide", "cyclopropane" ]
A
aqua_train
aqua_train_4856
In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The duration of the flight is:
[ "A)2", "B)3", "C)4", "D)5", "E)1" ]
E
sciq
sciq_4
The lipids that are connected to the glucose pathways are cholesterol and triglycerides. cholesterol is a lipid that contributes to cell membrane flexibility and is a precursor of this?
[ "ammonia hormones", "Somatostatin", "Thrombopoietin", "steroid hormones" ]
D
aqua_train
aqua_train_74552
If 0.75: x :: 5:12, then x is equal to:
[ "A)1.12", "B)1.16", "C)1.8", "D)1.3", "E)None of these" ]
C
aqua_train
aqua_train_90513
The period of 2 sin x cos x is
[ "A)4 pi 2", "B)2 pi", "C)4 pi", "D)pi", "E)None" ]
D
aqua_train
aqua_train_81113
log√ 8 / log 8 is equal to
[ "A)1/√8", "B)1/4", "C)1/2", "D)1/8", "E)None" ]
C
aqua_train
aqua_train_47065
The greatest common factor of two numbers is 4!. Which of the following can be the second number, if one of the numbers is 8!?
[ "A)3(5!)", "B)4(5!)", "C)5(5!)", "D)6(5!)", "E)4(4!)" ]
E
aqua_train
aqua_train_97377
The time taken by a man to row his boat upstream is twice the time taken by him to row the same distance downstream. If the speed of the boat in still water is 42 kmph, find the speed of the stream?
[ "A)16 kmph", "B)18 kmph", "C)14 kmph", "D)79 kmph", "E)27 kmph" ]
C
sciq
sciq_4
Wavelength and frequency are defined in the same way for electromagnetic waves as they are for which other waves?
[ "sonar", "light", "gravitational", "mechanical" ]
D
sciq
sciq_4
Each silicon atom shares how many valence electrons with other silicon atoms in a crystal?
[ "five", "ten", "three", "four" ]
D
aqua_train
aqua_train_59120
The average value of property of Mittal, Ambani and Singhania is Rs.11111 crore. The property of Singhania is as less than the property of Mittal is greater than the average property of both the Singhania and Mittal. The value of property of Ambani is?
[ "A)Rs. 17111 crore", "B)Rs. 11121 crore", "C)Rs. 11111 crore", "D)Rs. 12111 crore", "E)Rs. 11611 crore" ]
C
aqua_train
aqua_train_50010
If the numerator of a fraction is increased by 20% and its denominator is diminished by 25% value of the fraction is 2/15. Find the original fraction.
[ "A)1/12", "B)1/8", "C)1/6", "D)1/4", "E)1/2" ]
A
sciq
sciq_4
Where is the only place an electric charge can be found?
[ "translator", "ion", "neuron", "conductor" ]
D
aqua_train
aqua_train_10798
Find the value of sin 75° + sin 15° = ?
[ "A)0", "B)1/2", "C)1", "D)3/2", "E)2" ]
C
aqua_train
aqua_train_62144
4 mat-weavers can weave 4 mats in 4 days. At the same rate, how many mats would be woven by 12 mat-weavers in 12 days?
[ "A)25", "B)19", "C)39", "D)61", "E)36" ]
E
aqua_train
aqua_train_83175
It takes Avery 3 hours to build a brick wall while Tom can do it in 2.5 hours. If the two start working together and after an hour Avery leaves, how much time will it take Tom to complete the wall on his own?
[ "A)25 minutes.", "B)30 minutes.", "C)40 minutes.", "D)55 minutes", "E)1 hour and 20 minutes" ]
C
sciq
sciq_4
Where do radio waves lie on the electromagnetic spectrum?
[ "middle", "far right", "top", "far left" ]
D
aqua_train
aqua_train_25967
How many odd numbers between 10 and 1,200 are the squares of integers?
[ "A)12", "B)13", "C)14", "D)15", "E)16" ]
E
aqua_train
aqua_train_7621
A train 110 m long is running with a speed of 27 km/hr. In what time will it pass a man who is running at 6 km/hr in the direction opposite to that in which the train is going?
[ "A)7 sec", "B)6 sec", "C)8 sec", "D)4 sec", "E)12 sec" ]
E
aqua_train
aqua_train_8036
A sum of money place at compound interest doubles itself in 5 years. In how many years will it amount to eight times itself?
[ "A)15 years", "B)11 years", "C)12 years", "D)18 years", "E)19 years" ]
A
aqua_train
aqua_train_97442
A baker makes chocolate cookies and peanut cookies. His recipes allow him to make chocolate cookie in batches of 7 and peanut cookies in batches of 6. If he makes exactly 97 cookies, what is the minimum number of chocolate chip cookies he makes?
[ "A)7", "B)14", "C)21", "D)35", "E)49" ]
A
aqua_train
aqua_train_76274
15, 31, 63, 127, 255, ?
[ "A)543", "B)447", "C)972", "D)532", "E)511" ]
E
aqua_train
aqua_train_33479
A bag has 9 green balls and 23 pink balls. How many green balls should be added to the bag so that the ratio of green balls and pink balls in the bag becomes 1:1?
[ "A)10", "B)11", "C)12", "D)13", "E)14" ]
E
aqua_train
aqua_train_79795
Ratio between Rahul and Deepak is 4:3, After 6 Years Rahul age will be 34 years. What is Deepak present age?
[ "A)22", "B)15", "C)77", "D)21", "E)182" ]
D
aqua_train
aqua_train_45220
How many Q ways are there of placing 6 marbles in 4 bowls, if any number of them can be placed in each bowl?
[ "A)6C4", "B)6P4", "C)4^6", "D)6^4", "E)6!" ]
C
aqua_train
aqua_train_60081
Jim drove 1096 miles of a 1200 miles journey. How many more miles does he need to drive to finish his journey?
[ "A)104 miles", "B)432 miles", "C)456miles", "D)887 miles", "E)767 miles" ]
A
aqua_train
aqua_train_81057
Riya and Priya set on a journey. Riya moves eastward at a speed of 24kmph and Priya moves westward at a speed of 35 kmph.How far will be priya from Riya after 45 minutes
[ "A)25kms", "B)10kms", "C)50kms", "D)30kms", "E)44kms" ]
E
aqua_train
aqua_train_46487
The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?
[ "A)72", "B)55", "C)44", "D)66", "E)98" ]
A
aqua_train
aqua_train_84446
If it is assumed that 50 percent of those who receive a questionnaire by mail will respond and 300 responses are needed, what is the minimum number of questionnaires that should be mailed?
[ "A)400", "B)420", "C)480", "D)500", "E)600" ]
E
aqua_train
aqua_train_58940
The ratio of three numbers is 5:3:4 and their sum is 108. The second number of the three numbers is?
[ "A)24", "B)26", "C)27", "D)29", "E)30" ]
C
ds_train
ds_train_774
Batology is the scientific study of brambles, particularly those of the genus Rubus, such as blackberries and raspberries. Considering the interdisciplinary nature of batology, which of the following ecological factors should a batologist most likely study to understand the distribution of Rubus species in a given habi...
[ "A. Soil pH and nutrient composition\nB. The diversity of mammalian species in the area\nC. The migration patterns of birds\nD. The carbon footprint of the local human population" ]
A
aqua_train
aqua_train_26451
what is the maximum possible remainder when a number 104^n is divided by 51 ? (Assume n be any positive integer)
[ "A)29", "B)32", "C)96", "D)85", "E)78" ]
B
aqua_train
aqua_train_56690
By mixing two qualities of pulses in the ratio 2: 3 and selling the mixture at the rate of Rs 22 per kilogram, a shopkeeper makes a profit of 10 %. If the cost of the smaller quantity be Rs 14 per kg, the cost per kg of the larger quantity is:
[ "A)Rs 23", "B)Rs 25", "C)Rs 24", "D)None of these", "E)Cannot be determined" ]
C
sciq
sciq_4
Alpha, beta, and gamma emissions are associated with what kind of energy?
[ "kinetic", "electrical", "potential", "radiation" ]
D
aqua_train
aqua_train_47463
Find large number from below question The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder
[ "A)1209", "B)1324", "C)1245", "D)1300", "E)1635" ]
E
science_train
science_train_4144
Question: Does this passage describe the weather or the climate? Helena, Montana, got two inches of rain last night. Hints:
[ "climate", "weather" ]
B
aqua_train
aqua_train_3007
A particular store purchased a stock of turtleneck sweaters and marked up its cost by 20%. During the New Year season, it further marked up its prices by 25% of the original retail price. In February, the store then offered a discount of 10%. What was its profit on the items sold in February?
[ "A)27.5%", "B)30%", "C)35%", "D)37.5%", "E)40%" ]
C
aqua_train
aqua_train_55462
Find the 100th place digit of a number forming from digits 1 to 9 without repeatation and number passes the divisibility test of 11 means difference of sum of alternative digits is 0 or divisible by 11.
[ "A)1", "B)2", "C)3", "D)4", "E)5" ]
D
aqua_train
aqua_train_55201
Which of the following is a prime number ?
[ "A)2", "B)1", "C)5", "D)4", "E)3" ]
A
aqua_train
aqua_train_57601
If r and s are positive integers, and r^2 + r/s is an odd integer, which of the following cannot be even?
[ "A)3r + 2s", "B)(r-1)(s+2)", "C)r^(s+1) + s^r", "D)r^3 +3", "E)s^4 +4" ]
D
aqua_train
aqua_train_57037
A batsman scored 120 runs whichincluded 3 boundaries and 8sixes. What % of his total score did he make by running between the wickets
[ "A)20%", "B)50%", "C)60%", "D)70%", "E)80%" ]
B
science_train
science_train_6325
Question: Is the following trait inherited or acquired? Colton has naturally dark skin. Hints:
[ "acquired", "inherited" ]
B
aqua_train
aqua_train_55445
Every year an amount increases by 1/8th of itself. How much will it be after two years if its present value is Rs.1600?
[ "A)3000", "B)4200", "C)2025", "D)1205", "E)3251" ]
C
aqua_train
aqua_train_34253
The largest five digit number which is a perfect cube, is:
[ "A)85184", "B)91125", "C)97336", "D)96806", "E)99999" ]
C
aqua_train
aqua_train_51347
58, 52, 46, 40, 34, ... ?
[ "A)20", "B)22", "C)28", "D)27", "E)32" ]
C
aqua_train
aqua_train_89611
A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 5 km/hr. find the time taken by the boat to go 68 km downstream?
[ "A)2 hours", "B)3 hours", "C)3 hours 48 minutes", "D)5 hours", "E)None" ]
C
aqua_train
aqua_train_19524
A bag contains 7 green balls and 7 white balls. If two balls are drawn simultaneously, what is the probability that both balls are the same colour?
[ "A)4/13", "B)6/13", "C)8/21", "D)11/21", "E)17/42" ]
B