美国学术能力评估考试（SAT）
单选题The average (arithmetic mean) of x and y is m, where m ≠ 0. What is the average (arithmetic mean) of x, y, and 2m?A mB 4/3mC 3/2mD 5/3mE 2m
题目
单选题
The average (arithmetic mean) of x and y is m, where m ≠ 0. What is the average (arithmetic mean) of x, y, and 2m?
A
m
B
4/3m
C
3/2m
D
5/3m
E
2m
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