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16 March, 13:08

Is the average (arithmetic mean) of x and y greater than 20? the average (arithmetic mean) of 2x and 2y is 48. x = 3y?

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  1. 16 March, 14:13
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    2x + 2y = 48

    2 (x + y) = 48

    x + y = 24

    mean = 24/2 = 12

    less than 20
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