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30 July, 13:48

Find the value of n (An B) if n (A) = 9, n (B) = 11, and n (AUB) = 15. n (An B) = (Type a whole number.)

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  1. 30 July, 15:30
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    n (A∩B) = 5

    Step-by-step explanation:

    given,

    n (A) = 9

    n (B) = 11

    n (A U B) = 15

    we need to find n (A∩B) = ?

    using formula,

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

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

    n (A∩B) = 9 + 11 - 15

    n (A∩B) = 5
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