Question

If P and Q are two sets such that P ∪ Q has 40 elements, P has 22 elements and Q has 28 elements, how many elements does P ∩ Q have? ​

Answer 1

Answer:

answer is 10

Step-by-step explanation:

n(P U Q)= n(P)+ n(Q)- n(P intersection Q)

40=22+28-n (P imtersection Q)

atlast n(P intersection Q)= 10