Question

the means of x1, x2 is 7.5 and the mean of x1, x2 and x3 is 8. find x3

Answer 1

HEY MATE HERE IS YOUR ANSWER..

x1+x2+x3 = 8×3... 1
x1+x2 = 7.5(2)... 2...

x1+x2+x3=24...

x1+x2=15...
sub...

15+x3=24....

x3 = 9...

HOPE IT HELPS......