Question

Q 8. Let P and Q be two sets such that n(P) = 18, n(Q) = 22 and n(PUQ) - 40, find:
a) n(Pro)
b)n(P-Q)
c)n(Q-P)​

Answer 1

Answer:

n(P)=40

n(P∪Q)=60

n(P∩Q)=10

n(P∪Q)=n(P)+n(Q)−n(P∩Q)

60=40+n(Q)−10

n(Q)=60−40+10

n(Q)=30