Find the probability that the birthday of 7 persons will fall on 7 different days of the week assuming equal probability for each of these days.

Find the probability that the birth days of six different persons will fall in exactly two calendar months.

In a family there are 4 children. Find the probability that (i) all of them will have different birthdays, (ii) two of them will have the same birthday (1 year = 365 days).

Find the probability of each event when a die is rolled once

Find the probability that birthdays of any two members out of five members in a family fall on Sunday.

In family there are 5 children. Find the probability that (i) all of them will have different birthdays (ii) two of them will have the same birthday and (iii) at least two of them will have the same birthday (1 year = 365 days).

Find the probability that in a family of 4 children there will be at least one boy. (Assume that the probability of a male child is 1/2 )

Three contractors A,B,C are bidding for the construction of a new office building. The probability that C will get the contract is half the B's probability of getting the same: again, the probability that B will get the contract is (5)/(7) th of A's probability of getting the same. Find the probability of each to get the contract. (Assume that one of the three contractors A,B,C will get the contract.)