If `8` ships out of `10` ships arrive safely. find the probability that at least one would arrive safely out of `5` ships selected at random.

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

The probability of any ship return safely to the port is (1)/(5). Find the probability that the returning out of 4 ships,

If on an average 9 shops out of 10 return safely to a port,the probability of one ship returns safely is

If on an average 9 shops out of 10 return safely to a port,the probability of one ship does not reach safely is

If on an average 9ships out of 10 arrive safely to ports,find the meen and S.D.of ships returning safely out of a total of 500 ships.

The probability that out of 5 ship is wrecked by enemies is (1)/(5). The probability that out of 5 ships,at least 4 will is arrive safely after the journey,is

The probability of any ship return safely to the port is 1/5 .Find the probability that the returning out of 5 ships,at least 3 ships returns safely.It is given that returning ships are independently.

From a group of 4 men ,3 women , 2 persons are selected at random, find the probability at least one man is selected ?

If 10 objects are distributed at random among 10 persons,then find the probability that at least one of them will not get anything.