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Today, 15:17

If x and y are 2 sets such that n (x) is 17, n (y) is 23, n (xUy) is 38, find x intersection y

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  1. Today, 18:19
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    n (x intersect y) = 2.

    Step-by-step explanation:

    I think you mean n (x intersect y).

    n (x) + n (y) = 17 + 23 = 40.

    But n (x U y) = 38 so 40 - 38 = 2 elements are common to set x and set y.

    Therefore n (x ∩ y) = 2.
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