Give an example of a subset B ⊆ A whose power set P(B) has cardinality 4.

Question

Let A be the set of letters in your full name. Give an example of a subset B ⊆ A whose power set P(B) has cardinality 4.

Answer 1

A={P,A,T,R,I,C,K}

B = {A,C}

Power(B) = { { }, {A}, {C}. {A,C} }