If four people are chosen at random, then the probability that no two of them were born in the same day of the week

If three people are chosen at random, then the probability that no two of them were born on the same day of the week is

If 4 people are chosen at random, then find the probability that no two of them were born on the same day of the week

If 4 people are chosen at random, then find the probability that no two of them were born on the same day of the week.

If three people are chosen ata random, then the probability that no two of them were born in the same date of the month of september is

If 4 people are chosen at random,then the probability that exactly two of them have the same birthday and another two of them have another same birthday of a week is

Six married couples are locked in a room, If two people are chosen at random, then the probability that one is male and the other is a female is

Six married couples are locked in a room, If two people are chosen at random, then the probability that one is male and the other is a female is

Given a group of 4 persoms , find the probability that no two of them have their birthdays on the same day of the week,