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15 June, 08:12

The mean of the fourth number is 64.25. if three of the numbers are 58, 76, and 88, what is the value of the fourth number

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  1. 15 June, 09:37
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    I'm assuming you mean that the mean of four numbers is 64.25? In that case we have (58+76+88+x) / 4 = 64.25, where x is the fourth number.

    222 + x = 257

    x = 257 - 222 = 35
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