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Miscellaneous·2014·Easy

A and B are two sets having 3 elements in common. If n(A) = 5, n(B) = 4, then what is n(A × B) equal to ?

A and B are two sets having 3 elements in common. If n(A) = 5, n(B) = 4, then what is n(A × B) equal to ?

Options

  1. a.

    0

  2. b.

    9

  3. c.

    15

  4. d.

    20

    Correct answer

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