Question

7. If the mean of 6, 8, 9, x, 13 is 10, find the value of x.
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Answer 1

Answer:

$10 = \frac{6 + 8 + 9 + 13 + x}{5}$

$50 = 36 + x$

$x = 50 - 36$

$x = 14$

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