Question

7. If n(A - B) = 14, n(A U B) = 29 and n(A n B) = 9, then
n(B - A) is
(a) 5
(b) 6
(c) 7
(d) 10
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Answer 1

Answer:

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Step-by-step explanation:

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

Answer 2

Answer:

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