Question

If P and Q are two such sets that n(P)=18,n(P U. Q)= 30 and n(P n. Q)=4,find n (Q).​

Answer 1

Answer:

Ans is 43

Step-by-step explanation:

n(P∪Q)=n(P)+n(Q)−n(P∩Q)

⇒75=49+n(Q)−17

⇒75−32=n(Q)

⇒n(Q)=43