4 people are selected randomly out of six married couple. Find the probability that exactly one married couple is formed exactly two married couple are formed the do not form a married couple.

Three married couples sit in a row. Find the probability that no husband sits with his wife.

A committee of five is to be chosen from a group of 9 people. The probability that a certain married couple will either serve together or not at all is

A committee of five is to be chosen from a group of 9 people. The probability that a certain married couple will either serve together or not at all is

A committee of five is to be chosen from a group of 9 people. The probability that a certain married couple will either serve together or not at all is

3 distinct integers are selected at random form 1, 2, 3, …, 20. find out the probability that the sum is divisible by 5

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 couple are sitting in a room. Number of ways in which 4 people can be selected so that there is exactly one married couple among the four is:

The number of ways in which a mixed doubles tennis game can be arranged from 9 married couples:

If 4 letter words are formed using letters of the word 'MORADABAD'. Then the probability that D comes exactly once in the 4 letter word is

A committee of three persons is to be randomly selected from a group of three men and two women and the chair person will be randomly selected from 2 woman and 1 men for the committee. The probability that the committee will have exactly two woman and one man and that the chair person will be a woman, is