Question

if P and are two sets such that n(P)=12, n(Q-P), which among the following is the value of n(PUQ)​

Answer 1

Answer:

n(P∪Q)=n(P)+n(Q)−n(P∩Q)

n(P∪Q)=n(P)+n(Q)−n(P∩Q)⇒75=49+n(Q)−17

n(P∪Q)=n(P)+n(Q)−n(P∩Q)⇒75=49+n(Q)−17⇒75−32=n(Q)

n(P∪Q)=n(P)+n(Q)−n(P∩Q)⇒75=49+n(Q)−17⇒75−32=n(Q)⇒n(Q)=43