Question

find the average of 2 by 10, 5 by 10, 6 by10, 7 by 10, 8 by 10

Answer 1

$average = \frac{sum \: of \: data}{no \: of \: data}$
$= \frac{ \frac{2}{10} + \frac{5}{10} + \frac{6}{10} + \frac{7}{10} + \frac{8}{10}}{5}$

$= \frac{ \frac{2 + 5 + 6 + 7 + 8}{10} }{5}$
$= \frac{ \frac{28}{10} }{5}$

$= \frac{28}{50}$
$= \frac{14}{15}$
Average =0. 56