Question

find out mean of following data 20 30 15 10 15 15 20 35 30 35 15 10​

Answer 1

$mean = \frac{sum \: of \: quantity \: }{number \: of \: quantity }$

mean = (20+30+15+10+15+15+20+35+30+35+15+10)/12

mean =

$\frac{250}{12}$

mean = 20.833333