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Math

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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 n(A ∩ B) ?

  • Math -

    what elements are in both A and B?

    {3,4}

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