Question

If n(A) = 20 , n(B) = 4 , n(AΠB) = 9 then find n(A u B) = ?

Answer 1

Answer:

(AUB) = 15

Using the formula

(AUB)=n(A)+n(B)-n(AΠB)

(AUB)=20+4-9

(AUB)=15

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Answer 2

Answer:

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