Question

If the mean of the numbers 2x,3x,4x and 3x is 12,then the sum of the numbers is?

a)4
b)12
c)48
d)80​

Answer 1

C. 48.

Explanation:

If the mean is 12, then 12 must be 2x, 3x, 4x, and 3x divided by 4.

-->
`(2x+3x+4x+3x)/(4)=12`

-->
`(12x)/(4)=12`

-->
`\\3x=12`

--> x=4

Add: 2x+3x+4x+3x=8+12+16+12=48