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15 November, 20:17

If A={A, 15, E, 17,18, B, 20} and B={ X, 22, F, 42, Y, 62,72}, then what is n (A∪B) ?

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  1. 15 November, 21:48
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    14

    Step-by-step explanation:

    There are 7 elements in each set, and no elements are shared. The number of elements in the union of the sets is then ...

    n (A∪B) = 7+7 = 14
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