Question

Given n(A U B) = 48, n(A - B) = 10, and n(A - B) = n(B - A). Find n(A) and n(B).
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Answer 1

Answer:n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)

Given n(A)=7

n(B)=9

n(A∪B)=14

Substituting in 1

14=7+9−n(A∩B)

⇒n(A∩B)=16−14=2

Step-by-step explanation: