Question

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

Options

• 1

• 2

• 6

• 4

Answer 1

4

Explanation:-

According to question

`barx=(x+x+3+x+6+x+9+x+12)/5`

`=>10=(5x+30)/5`

⇒ 5x = 50 - 30

⇒ 5x = 20

⇒ x = 4