Question

how to solve this problem plz can you give answer fast as possible

Answer 1

find n(A), n(B), n(AUB) and n(A intersection B)

WHICH ARE

n(A) = 5 , n(B) = 6 , n(AUB)=9 and remaining is 2

Substitute these values in the given equation

Prove LHS = RHS

And you are done