If the average (arithmetic mean) of a and b is 110, and the average of b and c is 160, what is the value of a-c ？（） A. -220 B. -100 C. 100 D. 135 E. It cannot be determined from the information given.
If the average (arithmetic mean) of a and b is 110, and the average of b and c is 160, what is the value of a-c ？（）
A、 -220
B、 -100
C、 100
D、 135
E、 It cannot be determined from the information given.
发布时间：2025-07-27 18:06:56
