Question

A and B are the subsets of universal set U such that n(u) =700, n(A) =200 ,n(B) =300 and n(A intersection B) =100 find n(A' intersection B')

Answer 1

n(AUB) = n(A) + n(B) - n(AintB)

             = 200 + 300 - 100

             = 400

Given to find (A' intersection B') = 700 - 400

                                                      = 300


Hope this helps!