[中學] 取球問題
有3顆黃球 4顆綠球 5顆紅球 取完不放回
請問紅球最先取完的機率?
[感謝解惑~]
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11/22 11:03, , 1F
11/22 11:03, 1F
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11/22 11:16, , 2F
11/22 11:16, 2F
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11/22 12:04, , 5F
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11/23 13:45, 13F