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Averages and Algebra

[poll id=”131″]

ANSWER: E. $15.75

Solve this algebraically. Solve for x (amount fifth person gets paid).

x= [((4*12)+x) / 5] + 3

5x = 48 + x + 15

5x = 63 + x

4x = 63

x = 15.75

The 5th friend makes $15.75. This can be confirmed by adding up all 5 people’s pay and finding the average: (12+12+12+12+15.75)/5 = 12.75

$15.75 is $3 higher than the average of $12.75