Question

The mean of 12, 13, 15, 18, x, 28, 18, 12, 6, 8 is 15. Find the value of x.​

Answer 1

Answer:

22

Step-by-step explanation:

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Answer 2

$\huge\sf\underline\red{Answer :- }$

The formula of mean

$\large\sf\blue{mean = \frac{sum \: of \: observations}{number \: of \: observations} }$

Finding the value of x

$\sf\green{15 = \frac{12 + 13 + 15 + 18 + x + 28 + 18 + 12 + 6 + 8}{10} }$

$\sf\green{15 = \frac{138 + x}{10} }$

$\sf\green{15 \times 10 = 138 + x }$

$\sf\green{150 = 138 + x}$

$\sf\green{x = 150 - 138}$

${\large{\sf{\underline{\boxed{\red{x=12}}}}}}$