The mean of 8,4,5,x and 10 is 8 find the value of x

Dear Student.

$$\begin{gathered} We know that mean=\frac{sum of observations}{number of observations} \\ Therefore, \frac{8+4+5+x+10}{5}=8 \\ 27+x=40 \\ x=40-27 \\ x=13 \end{gathered}$$

We hope that this answer solves your query.
Regards.