His candid opinions have won him many friends

In how many different ways can one invite 3 or more of his 6 friends?

His assignments have taken him to many EXOTIC locations around the world.

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

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

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 ?

Mani had a pizza cut into 16 equal parts, if he ate 14 pieces and he gave two pieces to his friend, what fraction of the pizza did his friend ate?