Question

Find x if the mean of the numbers 6, 7,x, 2 is 4.

Answer 1

Given,

The mean of 6, 7, x, and 2 is 4.

To Find,

The value of x.

Solution,

The formula for calculating the mean is

Mean = Sum of observations/Total number of observations.

4 = (6+7+x+2)/4

16 = 15+x

x = 1.

Hence, the value of x is 1.

Answer 2

1

Given observations 6,7,x,2

Mean = 4

By formula

Mean = $\frac{sum of observation}{total observation}$

4 = $\frac{6+7+x +2}{4}$

16 = 15+x ( on cross multiplication)

x = 16-15 = 1