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kevincan
Jonah adds the greatest of three numbers to the average of the other two and divides the sum by two. If the result is x more than the average of the three numbers, what is the difference between the greatest of the three numbers and the average of the other two?

A. x
B. 2x
C. 3x
D. 4x
E. 6x
Responding to a pm:

When there is a variable in the options, plugging in a value is the easiest way to proceed. Just assume values and proceed step by step.

Assume the numbers are 1, 3, 5
Average of the smaller two numbers is 2. Average of the greatest number (5) and 2 is 3.5.
Average of all three numbers is 3.
So x = 3.5 - 3 = 0.5
The difference between 5 and average of other 2 i.e. 2 is 3.
3 = 6 * 0.5 so answer will be 6x.

Answer (E)
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