Question

Average of 3 numbers is 12. first number is 6 less than the average of the other two. third number is 6 more than the average of other two. what is the difference between first and third number

Answer 1

Step-by-step explanation:

Let the third number be x.

Then, second number be =3x

First number be =2×3x=6x

Given that,

Average of three numbers =40

Sum of three numbers =40×3=120

According to the question,

x+3x+6x=120

10x=120

x=12

Difference between largest and smallest numbers

=6x−x=5x=5×12=60.