Question

The arithmetic mean of X , X+3 ,X+6 , X+9 and X+12 is 10 than find x.​

Answer 1

Answer:

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Step-by-step explanation:

Given mean = 10

mean = sum of observations / number if observations

10 = X + X+3 + X+6 + X+9 + X+12 / 5

10 = 5x+30 / 5

50 = 5x + 30

50 -30 = 5x

20 =5x

therefore, x = 20/5 = 4

Answer 2

$\huge{ \boxed{ \boxed{ \tt \red{x = 4}}}}$

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