2. 职称英语
  3. M(r, s, t) denotes the average (arithmetic mean) of r, s, and t, and M (x, y) de

M(r, s, t) denotes the average (arithmetic mean) of r, s, and t, and M (x, y) de

游客2024-01-12  30
问题 M(r, s, t) denotes the average (arithmetic mean) of r, s, and t, and M (x, y) denotes the average of x and y.

Column A                       Column B
M (70, 80, 90)                 M (x, 90) where x = M (70, 80)
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案 B
解析 M(r，s，t)表示r，s和t的算术平均值，M (x，y)表示x和y的算术平均值。
解：本题的正确答案为(B)。左项的算术平均值等于80，右项的算术平均值等于(150/2+90)/2=82.5
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