A comittee of 5 is to be chosen from group of 9 people. No. of ways it can be formed if 2 oarticular persons either serve together or mot at all. And 2 other particular persons refuses two serve with each other.

A committee of 5 is to be chosen from a group of 9 people.Number of ways in which it can be formed if two particular persons either serve together or not at all and two other particular persons refuse to serve with each other,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

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

A committee of 3 persons is to be constituted from a group of 2 men and 3 women. In how many ways can be done?