Question

if the mean of the following frequency distribution is 7.2 x=2,4,6,8,10,12 and f=4,7,10,16​

Answer 1

Answer:

ˉ

=

∑F

∑Fx

=

40+K

260+10K

=7.2

260+10K=288+7.2K

2.8K=28

K=10.

solution