Question

A and B are two sets containing 300 and 500 elements respectively and they have 100 elements on common . if the universal set is having 1000 elements the number of elements in A' n B' will be

Answer 1

Answer:

n(A)=300

n(B)=500

n(AuB)=n(A)+n(B)-n(AinrersectionB)

=300+500-100

=800-100

=700