Question

The number of proper subsets of the set {3, 4, 5, 6, 7} is
(a) 32
(b) 31
(c) 30
(d) 25

Answer 1

The number of proper subsets of a set with n terms is 2^n - 1.

so here answer is 31 (b)

Answer 2

Answer:

Step-by-step explanation:

P( {3 , 4 , 5 , 6 , 7} ) = 2^5 = 32.

(a) is correct