A person wants to invite one or more of his friends for a dinner party

MATHEMATICS · Single correct · CBSE · Mathematics · Permutations and Combinations · Permutations and Combinations

Problem

A person wants to invite one or more of his friends for a dinner party. In how many ways can he do so if he has eight friends :- (A)

2^8

(B)

2^8 - 1

(C)

8^2

(D)

{}^8C_1 + {}^8C_2 + \dots + {}^8C_8