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4 January, 14:09

Of the 80 houses in a development, 50 have a two-car garage, 40 have an in-the-ground swimming pool, and 35 have both a two-car garage and an in-the-ground swimming pool. How many houses in the development have neither a two-car garage nor an in-the-ground swimming pool?

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  1. 4 January, 16:35
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    Total number of houses = 80

    number of houses with two garage=50

    number of houses with in-ground swimming pool=40

    number of house with garage and swimming pool=35

    thus number of houses with garage alone=50-35=15

    Number of houses with in-ground swimming pool alone=40-35=5

    Total number of house with atleast a garage of a swimming pool will be:

    (35+15+5) = 55

    Number of house that have neither swimming pool nor garage:

    80-55=25 houses
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