Question

外出就餐时，Mike 和 Joe 各给服务员 $\$2$ 的小费。Mike 的小费是他账单的 $10\%$ ，Joe 的小费是他账单的 $20\%$ 。他们账单相差多少美元？

While eating out, Mike and Joe each tipped their server $\$2.$ Mike tipped $10\%$ of his bill and Joe tipped $20\%$ of his bill. What was the difference, in dollars, between their bills?

$2$

$4$

$5$

$10$

$20$

答案：D

知识点：百分数钱币

难度评级：900

解答：

Mike 的 $\$2$ 小费是账单的 $10\%$ ，所以他的账单是 $2 \times 10 = 20$ 美元。Joe 的 $\$2$ 小费是账单的 $20\%$ ，所以他的账单是 $2 \times 5 = 10$ 美元。差为 $20 - 10 = 10$ 美元。

所以正确答案是 D。

Mike's $\$2$ tip is $10\%$ of his bill, so his bill is $2 \times 10 = 20$ dollars. Joe's $\$2$ tip is $20\%$ of his bill, so his bill is $2 \times 5 = 10$ dollars. The difference is $20 - 10 = 10$ dollars.

Thus, the correct answer is D.

2005 AMC 10A 第 1 题

答案：D

难度评级：900

解答：

其他年份的第 1 题