Question

If A,B,C are there sets and S isthe universal set such that n(s) =900 ,n(A) = 400 ,n(B)=250 and n(AnB)= 150 then n(A1nB1)=

Answer 1

Answer:

400

Step-by-step explanation:

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

=400+250-150

=500

n(A'nB') =n(s)-n(AUB)

=900-500

=400