Question

How many elements has P(A), if A = phi
a) 1
b) 2
c) 3
d) 0

Answer 1

Answer:

2.

will be the answer.

Hope you understand.

Answer 2

Answer:

We know that if A is a set with m elements i.e., n(A)=m,

then, n[P(A)]=2

m

.

If A=ϕ, then n(A)=0

∴n[P(A)]=2

o

=1

Hence, P(A) has one element.