GRE Problem Solving Question 74
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Source: BARRON
If the average (arithmetic mean) of x, y, and z is 20, which of the following is the value of z in terms of x and y?
- A 20 - x - y
- B 20 + x + y
- C 40 - x - y
- D 40 + x + y
- E 60 - x - y