AMC 8 2020 Problem 2
AMC8 2020 年第 2 题
表达式与运算★☆☆☆☆
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?
四个朋友在周末为他们的邻居打扫院子，收入分别为＄15，＄20，＄25 和＄40。他们决定平分收入。那么赚了 40 美元的那个朋友总共会给其他人多少钱？
- A.$5
- B.$10
- C.$15
- D.$20
- E.$25
正确答案 · Correct Answer
C
解析 · Solution
Solution 1
The friends earn in total. Since they decided to split their earnings equally, it follows that each person will get . Since the friend who earned $40 will need to leave with $25, he will have to give to the others.
The friends earn in total. Since they decided to split their earnings equally, it follows that each person will get . The friend who earned 25 will not distribute anything, the friend that earned 15 needs 10, and the friend that earned 20 needs 5. 10 + 5 = 15, therefore the answer is .
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