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

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

Move the decimal behind it

1. 3/6 or 1/22. 1/123. 1/84. 1/105. 2/12 or 1/6