AMC 8 2023 Problem 5
AMC8 2023 年第 5 题
比与比例★☆☆☆☆
A lake contains 250 trout, along with a variety of other fish. When a marine biologist catches and releases a sample of 180 fish from the lake, 30 are identified as trout. Assume that the ratio of trout to the total number of fish is the same in both the sample and the lake. How many fish are there in the lake?
湖里有 250 条鳟鱼，以及其他一些鱼类。当一位海洋生物学家从湖中捕获并释放 180 条鱼的样本时，他发现其中 30 条鱼是鳟鱼。假设在样本中鳟鱼所占的比例和湖里鳟鱼在全部鱼类中所占的比例相同。问湖里有多少条鱼？
- A.1250
- B.1500
- C.1750
- D.1800
- E.2000
正确答案 · Correct Answer
B
解析 · Solution
解析整理中
继续练习