Question

Find the value of N when the mean = 4 and sum of all scores = 40.

• A. 10
• B. 4
• C. 5
• D. 8

Answer 1

The correct option is A 10

$Mean\left(\overline{x}\right)=\frac{\sum f_i{x}_i}{N}$

We are given,
$\sum f_i{x}_i$ = 40
Mean = 4

Now we can write,

$4=\frac{40}{N}$

$\therefore N=\frac{40}{4}=10$