AMC 8 2020 Problem 13
AMC8 2020 年第 13 题
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Jamal has a drawer containing 6 green socks, 18 purple socks, and 12 orange socks. After adding more purple socks, Jamal noticed that there is now a 60% chance that a sock randomly selected from the drawer is purple. How many purple socks did Jamal add?
有个抽屉，里面有 6 只绿色袜子，18 只紫色袜子，12 只橙色袜子。当加了更多紫色袜子后，Jamal 发现，从抽屉里随机抽取一只袜子，有 60％的概率是紫色的。那么 Jamal 加了多少只紫袜子？
- A.6
- B.9
- C.12
- D.18
- E.24
正确答案 · Correct Answer
B
解析 · Solution
解析整理中
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