Question

If the mean of the scores 8, 5, 6, 7, x

and 4 is 6.5, then what is the value of

x ?

Answer 1

8+5+6+7+x/5=6.5
26+x=32.5
x=6.5

Answer 2

Mean=sum of observations /no. of
observations
6.5=8+5+6+7+x/5
6.5=26+x/5
6.5×5=26+x
32.5-26=x
x=6.5