A man has 6 friends. In how many ways can he invite one or more of his friends to a party ?

In how many ways can a person invite one or more of his 8 friends to a feast ?

A man has 7 friends. In how many ways can he invite one or more of them to a party ?

A man has 10 friends. In how many ways he can invite one or more of them to a party?

Mohan has 8 friends, in how many ways he invite one or more of them to dinner?

A man has 6 friends. Number of ways he can invite one or more of them to a tea party is

In how many ways can a tissue grow in size?

In how many ways can six different rings be worn on the four fingers of one hand ?

A man has three friends. The number of ways he can invite one friend everyday for dinner on six successive nights so that no friend is invited more than three times is a. 640 b. 320 c. 420 d. 510

A child has four pocket and three marbles. In how many ways can the child put the marbles in its pocket?

A committee of 3 persons is to be constituted from a group of 2 men and 3 women. In how many ways can this be done? How many of these committees would consist of 1 man and 2 women?