Four friends do yardwork for their neighbors over the weekend, earning $15,$20, $25, and$40, respectively. They decide to split their earnings equally among themselves. In total how much will the friend who earned $40 give to the others?

A. $5

B. $10

C. $15

D. $20

E. $25

1. 2020 AMC 8 官方解析

Altogether the four friends earned $100, so they each will have$25 after they divide their earnings equally. The friend who earned $40 will give to the others$40 - $25 =$15.
这四个朋友一共赚了$100$美元，因此，他们将收入平均分配后，每个人都会有$25$ 美元。赢得$40$美元的朋友将给其他人$40 - 25 = 15$美元。