Question

15. The mean of observation a-5, a+1, a+2, a-3, a is 10. Find the value of a.​

Answer 1

Answer:

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Step-by-step explanation:

$Mean = \frac{Sum \: \: of \: observations}{No. \: \: of \: \: observations}\\ \\ \frac{(a - 5) + (a + 1) + (a + 2) + (a - 3) + (a)}{5} = 10 \\ \\ \frac{5a - 5}{5} = 10 \\ \\ 5a - 5 = 50 \\ \\ 5a = 50 - 5 \\ \\ 5a = 45 \\ \\ a = \frac{45}{5} \\ \\ a = 9$