A. 0
B. 1/7
C. 2/7
D. 5/7
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0
Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is_________?
0
A bag contains five white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color?
A. 10/17
B. 10/19
C. 46/105
D. Cannot be determined
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0
A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are picked at random, what is the probability that they are either blue or yellow?
A. 4/9
B. 5/9
C. 7/9
D. 8/9
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0
A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are picked at random, what is the probability that they are all blue?
A. 3/22
B. 4/21
C. 2/21
D. 1/14
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0
A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If four marbles are picked at random, what is the probability that none is blue?
A. 1/455
B. 2/455
C. 1/91
D. 4/455
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0
A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that at least one bulb is good.
A. 17/91
B. 33/91
C. 51/91
D. 65/91
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0
A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that all the four bulbs are defective.
A. 6/63
B. 2/63
C. 125/126
D. 1/126
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0
Three 6 faced dice are thrown together. The probability that exactly two dice show the same number on them is -.
A. 62/63
B. 125/126
C. 1/63
D. 1/126
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