The successive trials are with replacement in
A). Geometric distribution
B). Binomial distribution
C). Hypergeometric distribution
D). None of above
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). 3/22
B). 4/21
C). 2/21
D). 1/14
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). 1/455
B). 2/455
C). 1/91
D). 4/455
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). 17/91
B). 33/91
C). 51/91
D). 65/91
A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that exactly three bulbs are good.
A). 20/31
B). 20/63
C). 5/31
D). 6/31