Question

If n(A)=26 ,n(A') = 17 then n(∪)=???
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Answer 1

Answer:

???????................

Answer 2

(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 ....... thanku

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