一个口袋中有4个白球,1个红球,7个黄球.搅匀后随机从袋中摸出1个是白球的概率是_________.

作者: tihaiku 人气: - 评论: 0
问题 一个口袋中有4个白球,1个红球,7个黄球.搅匀后随机从袋中摸出1个是白球的概率是_________.
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相关内容:口袋,白球,红球,黄球,概率

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