Question

d)
The number of all possible proper subsets of {2, 3, 5) is
a) 3
b)
c) 7
d) 8
8​

Answer 1

Answer:

A={1,2,{3,4}}

Number of elements in A,n=3.

Total number of subsets of A=2n=23=8.

Except for set A and null set, all other sets are proper sets.

Hence number of proper subsets =8−2=6.