Question

. If the arithmatic mean of x, x+3, x+6, X+9 and x+12 is 10, then x = ___ *

Answer 1

Answer:

x=4

Step-by-step explanation:

mean= sum of observations/ number of observations

given,

mean=10

10= 5x+30/5

5x=20

x=4

I hope this helps u