If the average (arithmetic mean) of x, y, and 20 is 11, then the average of 2*x ...【小站备考】

GRE®

登录注册

返回

Question 7 Selected one answer choice

收藏

笔记

反馈

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

If the average (arithmetic mean) of x, y, and 20 is 11, then the average of 2*x + 3, 2*y - 4, and 8 is

A.11

B.12

C.13

D.14

E.15

我的答案：