Three integers are selected simultaneously from the set of integers `{1, 2, 3, ..., 50).` The probability that the selected numbers are consecutive is equal to

Three numbers are selected simultaneously from the set (1,2,3,...,25). The probability that the product of the selected numbers is divisible by 4 is equal to

Two numbers a and b are chosen simultaneously from the set of integers 1, 2, 3, ….., 39, then the probability that the equation 7a-9b=0 is satisfied is

Three numbers are selected from the set {1,2,3,...,23,24}, without replacement.The probability that the selected numbers form an A.P.is equal to

A number is selected at random from the set {1, 2, 3, ........ , 50}. The probability that it is a prime, is

Two persons are selected at random, from n persons seated in a row (n ge 3) . The probability that the selected persons are not seated consecutively, is equal to

A number is selected at random from the set {1, 2, 3, …, 50}. The probability that it is a prime, is

From the set of numbers {1,2,3,...,10} , 4 numbers are selected at random. The probability that all of the selected numbers are consecutive is

Three different numbers are selected at random from the set A=(1,2,3,...,10) The probability that the product of two of the numbers is equal to the third is

From the set of numbers {1,2,3,...,10} , 4 numbers are selected at random. The probability that at least 2 of the selected numbers are consecutive is