Question

if the mean of 8,6,9,p,p+2,12,15,and 22 is 10 find the value of p

Answer 1

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Answer 2

$mean = \frac{sum \: of \: terms}{number \: of \: terms} \\ 10 = \frac{8 + 6 + 9 + p + p + 2 + 12 + 15 + 22}{8} \\ 10 \times 8 = 2p + 74 \\ 2p = 80 - 74 \\ p = \frac{6}{2} \\ p = 3$
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