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2 May, 20:12

Find the value of y 7,8,2,5, y; mean=5

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  1. 2 May, 22:15
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    Value of y = 3

    Mean is the average of all numbers. We must add up all the numbers and divide the sum by the numbers there are.

    (7 + 8 + 2 + 5 + y) / 5 = 5

    (22 + y) / 5 = 5

    Perform Cross multiplication.

    22 + y = 5

    5 1

    (22 + y) * 1 = 5 * 5

    22 + y = 25

    Find y. Transfer 22 to the other side and change its sign.

    y = 25 - 22

    y = 3.

    To check. Substitute y with its value.

    (7 + 8 + 2 + 5 + y) / 5 = 5

    (7 + 8 + 2 + 5 + 3) / 5 = 5

    25 / 5 = 5

    5 = 5
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