Question

三所中学的学生参加了一个暑期项目。Allen School 的七名学生工作了 $3$ 天。Balboa School 的四名学生工作了 $5$ 天。Carver School 的五名学生工作了 $9$ 天。学生工作的总报酬为七百七十四美元。假设每名学生每天获得相同报酬，那么 Balboa School 的学生总共赚了多少？

Students from three middle schools worked on a summer project. Seven students from Allen School worked for $3$ days. Four students from Balboa School worked for $5$ days. Five students from Carver School worked for $9$ days. The total amount paid for the students' work was $774. Assuming each student received the same amount for a day's work, how much did the students from Balboa School earn altogether?

$9.00

$48.38

$180.00

$193.50

$258.00

答案：C

知识点：速率

难度评级：1090

解答：

总学生天数为 $7 \times 3 + 4 \times 5 + 5 \times 9$ $= 21 + 20 + 45$ $= 86$ 。

所以每个学生天报酬为 $\$774 \div 86 = \$9$ 。Balboa 共工作 $20$ 个学生天，赚得 $20 \times \$9 = \$180$ 。

所以正确答案是 C。

The total student-days are $7 \times 3 + 4 \times 5 + 5 \times 9$ $= 21 + 20 + 45$ $= 86.$

So each student-day pays $\$774 \div 86 = \$9.$ Balboa worked $20$ student-days, earning $20 \times \$9 = \$180.$

Thus, the correct answer is C .

1995 AMC 8 第 16 题

答案：C

难度评级：1090

解答：

其他年份的第 16 题