Question

the ages of 6 girls at a summer camp are as follows 9,10,10,13,12,15. find the arithmetic mean of their ages.​

Answer 1

Answer:

(x-1) ,x,x,(x+3),(x+2),(x+5)

Answer 2

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$arithmetic \: \: \: mean \: = \frac{sum \: o f\:given \: terms }{total \: no. \: of \: terms} \\ \\ = \frac{9 + 10 + 10 + 13 + 12 + 15}{6} \\ \\ = \frac{69}{6} \\ \\ = 11.5$

Hence, the mean is 11.5

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