Question

Mean of 15,12,10,9,8,13,17

Answer 1

Answer:

$mean \: \: \: \: \: = \: \: \: \: \: \frac{sum \: \: \: of \: \: \: all \: \: \: \: numbers}{total \: \: \: \: numbers} \\ \\ \\ = \frac{15 + 12 + 10 + 9 + 8 + 13 + 17}{7} \\ \\ = \frac{87}{7} = 72.42857142.....$