Question

If a and b are two disjoint sets that n(a) =24,n(b) =22. Find n ( AUB) and n( A-
B)

Answer 1

Step-by-step explanation:

n(AUB) = n(A) + n(B)

n(AUB) = 24 + 22

n(AUB) = 46

n(A-B) = n(A) - n(AᑎB)

n(A-B) = 22 - 0 (because A and B are disjoint sets i.e. AᑎB = 0)

n(A-B) = 22