If the arithmetic mean of x, x + 3, x + 6, x + 9, and x + 12 is 10, the x =

Question

Philoid · Accepted Answer

Terms are x, x + 3, x + 6, x + 9, x + 12

No of terms = 5

We know that

Mean

⇒ 50 = 5x + 30

⇒ 5x = 20

⇒ x = 4