Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:

Two unbiased coin are tossed .What is the probability of getting at most one head?

Binomial distribution is negatively skewed when

A man and his wife appear in an interview for two vacancies in the same post. The probability two of husband’s sel…

A basket contains 4 red, 5 blue and 3 green marbles. If 2 marbles are drawn at random from the basket, What is the proba…

Two friends A and B apply for a job in the same company. The chances of A getting selected is $$\frac{{2}}{{5}}$$ and th…

If the chance that a vessel arrives safely at a port is $$\frac{{9}}{{10}}$$ then what is the chance that out of 5 vesse…

A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are picked at random, what is…