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posted by Pat on Sunday, September 9, 2012 at 10:48am.

if the universal set U is defined by U={1,2,3,4,5,6,7,8,9,10}and A={1,2,3,4} B={3,4,5,6,7} what is contained in A n B'=the intersection of A and B'?

How should I know

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