A person has `n` friends. The minimum value of `n` so that a person can invite a different pairs of friends every day for four weeks in a row is _____.

A person has 8 friends.The number of ways in which he may invite one or more of them to a dinner is.

A person has 6 friends . He invites one or more then one friends. For dinner in ….. Ways.

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

A man has 6 friends. The number of ways can he invite one or more of them to dinner is

In how many ways can a person invites his 2 or more than 2 friends out of 5 friends for dinner?

In how many ways can a person invites his 2 or more than 2 friends out of 5 friends for dinner?

A person has 12 friends.In how many ways he can invite them for a party (one person for at least one time)?

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 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