If one out of 10 coming ships is wrecked. Find the probability that out of five coming ships at least 4 reach safely.

A die is thrown twice. What is the probability that 5 will come up at least once?

If a fair coin is tossed 8 times. Find the probability of at least five heads.

In a family of 3 children, find the probability of having at least one day.

Ten eggs are drawn successively with replacement from a lot containing 10% defective eggs. Find the probability that there is at least one defective egg.

A die is thrown 10 times, the probability that an odd number will come up atleast one time is

If a fair coin is tossed 6 times. Find the probability of (i) at least five heads and (ii) exactly 5 heads.

Three fair coins are tossed. Find the probability of getting a]. At least one head. b]. At most one head.

Consider the experiment of tossing two fair coins simultaneously, find the probability that both are head given that at least one of them is a head.

The probability that a student is not a swimmer is (1)/(5) . Find the probability that out of 5 students. at most three are swimmers.