Question

四个朋友周末为邻居做院子活，分别赚了 $\$15$ 、 $\$20$ 、 $\$25$ 和 $\$40$ 。他们决定把收入平均分给四个人。赚了 $\$40$ 的朋友一共要给其他人多少美元？

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 many dollars will the friend who earned $\$40$ give to the others?

$5$

$10$

$15$

$20$

$25$

答案：C

知识点：平均数钱币

难度评级：450

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文字解答：

他们总共赚了 $\$15+\$20+\$25+\$40=\$100$ 。

平均分给四个人后，每人应得 $\frac{100}{4}=25$ 美元。

赚 $\$40$ 的朋友比最终应得的金额多 $\$40-\$25=\$15$ ，所以他要给其他人共。

正确答案是 C。

First, the total amount of money that they make is $\$15+\$20+\$25+\$40=\$100.$

Since they divide this equally, they each get $\frac{100}{4}=25$ dollars.

The friend who earned $\$40$ therefore gives away $\$40-\$25=\$15.$

Thus, the correct answer is C.

2020 AMC 8 第 2 题

答案：C

难度评级：450

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文字解答：

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