Question

if p and q r 2 sets such that p =40, (PnQ)=10, (PuQ)=60 find how many elements Q have​

Answer 1

Answer:

Answer is 30.

Step-by-step explanation:

using formula

n(PuQ) = n(P) + n(Q) - n(PnQ)

60 = 40 + n(Q) -10

n(Q) = 30

Thanks!!