Question

given that the number of subsets of a set A is 8 , find the number of elements in A​

Answer 1

$a = {{1 \: 2 \: 3 \: 4 \: 5 \: 6 \: 7 \: 8}}$

Answer 2

Answer:  

n(A)=4

Step-by-step explanation:

Let n(A) = m

n[P(A)] = 16  

⇒ 2m = 16  

⇒ m= 4

n(A)= 4