Question

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The mean of 9, 14, x, 16, 7 and 18 is 11.5. Find the value of x.




please don't give Silly answer and don't say that I don't know and please give the answer with explanation........ ​

Answer 1

Answer:

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Step-by-step explanation:

observations = 9, 14, x, 16, 7 and 18

mean = 11.5

$mean = \frac{sum \: of \: observations}{no. \: of \: observations} \\ \\ 11.5 = \frac{9+14+x+16+7+18}{6} \\ \\ 11.5= \frac{64 +x}{6} \\ \\ 69 = 64 + 3x \\ \\ 69 - 64= x \\ \\ x = 5$