Question

If A = P ({1, 2}), where P denotes the power set, then which one of the following statements is correct?

(a) {1, 2} ⊂ A 

(b) 1∈Α 

(c) ϕ ∉ A 

(d) {1, 2}∈Α

Answer 1

(d) {1, 2} ∈ A

Given, A = P ({1, 2}), then A = [ ϕ, {1}, {2}, {1, 2}] ⇒ {1, 2} ∈ A