Question

The average of three numbers is 15. What is two times the sum of the the three numbers?

Please show how you did it~!! >_

Answer 1

If three numbers average 15, then their sum is 45. Two times 45 is 90.

Answer 2

average is the sum divideided by the number of numbers added together

so avarage of 3 number is 15 means
three numbers represented as x+y+z so

`(x+y+z)/(3)` = 15
(x+y+z)/3=15
multiply both sides by 3 to clear fraction
x+y+z=45
45 is the sum of the 3 numbesr
double of that is
45 times 2=90