1.

If n(A) = 8 , n(A∪B) = 17 , n(A∩B) = 2 , then n(B) = ?​

Answer»

Step-by-step explanation:

n (A U B) = n ( A ) + n ( B ) - n (A ∩ B)

17 = 8 + n ( B ) - 2

17 = 6 + n ( B )

n ( B ) = 17 - 6 = 11

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