Question

(Only Genius ) please help me

Answer 1

A={1,2,3,4}

B={2,3,5,7}

n(A) =4
n(B)=4
n(AnB) =2
n(AUB) =6

Lhs
=n(AUB) +n(AnB)
=6+2=8
Rhs=n(A) +n(B) =4+4=8


Hence LHS=RHS
PROVED