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ZX-2FEF6095492025年3月国际A卷 · 第 7 题
2025年3月国际A卷 · 原库模块 2 · Q7 原库参考解析
At a convention center, there are a total of 225 visitors. Each visitor is located in either room A, room B, or room C. If one of these visitors is selected at random, the probability of selecting a visitor who is located in room A is 0.72, and the probability of selecting a visitor who is located in room B is 0.24. How many visitors are located in room C?
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