Question

For A,B € P (U), n(A)= 75, n(B)= 25, n(AnB)= 10, then find n[(AnB') U (A'nB)].​

Answer 1

Answer:

n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)

Given n(A)=7

n(B)=9

n(A∪B)=14

Substituting in 1

14=7+9−n(A∩B)

⇒n(A∩B)=16−14=2