Question

 If n(A) =35,n(B) =40 and n(A∪B)=50 then n(A ∩ B)=...... *


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Answer 1

Answer: 25

Explanation:

Given that n(A) = 35 , n(B) = 40 and n(A∪B) = 50

We know that, n(A∪B) = n(A) + n(B) - n(A∩B)

ie, 50 = 35 + 40 - n(A∩B)

ie, n(A∩B) = 35 + 40 - 50

                = 75 - 50

               = 25

HOPE THIS HELPS..........