Question

P has 40 elements,P∪Q has 60 elements and P∩Q has 10 elements, then how many elements does Q have

Answer 1

Answer:

Hope it will be helpful

Step-by-step explanation:

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