Question

The average of three numbers is 28. The first number is half of the second and the third number is twice the second. The third number is

Options

• 18

• 24

• 36

• 48

Answer 1

48
Explanation:
Let second number = x

Then, first number = `x/2` and third number = 2x

∴        `(x+(x/2)+2x)/3=28`

⇒                    `3x+x/2=84`

⇒                              `7x=168⇒ x=24`

Hence, third number = 2 x 24 = 48