Question

If the arithmetic mean of x, x + 3, x + 6, x + 9, and x + 12 is 10, the x =
A. 1
B. 2
C. 6
D. 4

Answer 1

Answer:

the value of x in given question is 4

Answer 2

D. 4

Step-by-step explanation:

Data: x, x + 3, x + 6, x + 9, and x + 12

N = 5

Sum of data = x + x + 3 + x + 6 + x + 9 + x + 12

            = 5x + 30

Arithmetic Mean = sum / N  

10 = 5x + 30 / 5

50 = 5x + 30

5x = 20

Therefore x = 20 / 5 = 4

Option D is the answer.