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.

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 xx is a.640 b.320 c.420 d.510

A perosn has 12 friends of whom 8 are reltives. In how many wys can he invite 7 friends such that at least 5 of them may be relatives?

A man has 7 friends and he wants to invite 3 of them at a party. Find how many parties to each of 3 different friends he can give and how many times any particular friend will attend the parties?

A woman has 11 close friends.Number of ways in which she can invite 5 of them to dinner if two particular friends of them are not on speaking terms and will not attend together is

A person has 12 friends out of which 7 are relatives. In how many ways can he invite 6 friends such that at least 4 of them are relatives?

Anil has 8 friends In how many wasys can he invite one or more of his friends to a dinner?