Question

5. If the mean of 6, 4, 7, a and 10 is 8, find the value of 'a'.
The mean of the number 6, y, 7, x and 14 is 8. Express y in terms of x.​

Answer 1

$mean = no.of \: observations \div sum \: of \: observations \\ mean = 6 + y + 7 + x + 14 \div 5 \\ 8 = \frac{27 + x + y}{5} \\ 40 = 27 + x + y \\ x + y = 13. \\ \\ \\ mark \: me \: as \: brainliest$

$mean = \frac{6 + 4 + 7 + a + 10}{5} \\ 8 = \frac{27 + a}{5} \\ 40 = 27 + a \\ a = 13.$

Answer 2

Answer:

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