Question

n A=20, n B=28 ,n A union B=36 find A intersaction B
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Answer 1

Answer:

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Answer 2

Answer:

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

substitute the given values

36=20+28- n(A intersection B)

36-48 =-n(A intersection B)

therefore

n(A intersection B) = 12