To check: Whether it is possible to find a formula for n ( A ∩ B ) in terms of only n ( A ) and n ( B ) and explain it, then find a formula for n ( A ∩ B ) using any sets.

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Chapter 2.3, Problem 84E

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To check: Whether it is possible to find a formula for n(A∩B) in terms of only n(A) and n(B) and explain it, then find a formula for n(A∩B) using any sets.

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