2. 外语
  3. In a certain box, there are 3 times as many red balls as blue balls. Which of the following is the ratio of the number of red ba

In a certain box, there are 3 times as many red balls as blue balls. Which of the following is the ratio of the number of red ba

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问题 In a certain box, there are 3 times as many red balls as blue balls. Which of the following is the ratio of the number of red balls to the number of blue balls?
选项 A、1 to 2
B、1 to 3
C、3 to 1
D、2 to 3
E、3 to 4
答案C
解析 题目中红球数目是蓝球数目的3倍，那么红球对蓝球数目的比是3：1，选择C。
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