Question

If the mean of x, x + 2, x + 4, x + 6, and x + 8 is 13, calculate the value of x.

• A. 3
• B. 6
• C. 9
• D. 12

Answer 1

The correct option is C 9

Mean of x, x + 2, x + 4, x + 6 and x + 8 is 13.

The value of x can be calculated as below.

Mean = $\frac{Sumofnumbers}{Totalnumbers}$
13 = $\frac{x+(x+2)+(x+4)+(x+6)+(x+8)}{5}$

On further calculation, we get:

13 × 5 = 5x + 20
65 = 5x + 20
5x = 65 – 20
5x = 45
x = 9

Hence, the value of x is 9.