# Kimberly wants to become a member of the desert squad at a big catering company very badly, but she

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Kimberly wants to become a member of the desert squad at a big catering company very badly, but she must pass three difficult tests to do so. On the first Terrifying Tiramisu test she scored a 68. On the second the challenging Chocalate-Sprinkled Creme Brulee she scored a 72. If kimberly needs an average of 60 on all three tests to become a member on the squad what is the lowest score she can make on her third and final test

This is a missing average problem.

Given 2 scores of 68, 72, what should be score number 3 in order to attain an average score of 60?

Setup Average Equation:
Average = (Sum of our 2 numbers + unknown score of x)/Total Numbers
60 = (68 + 72 + x)/3

Cross Multiply
68 + 72 + x = 60 x 3
x + 140 = 180

Subtract 140 from both sides of the equation to isolate x:
x + 140 - 140 = 180 - 140
x = 40