
[機統] 請教一題高中機率

請問大大,該如何解,謝謝!
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05/11 14:10, , 1F
05/11 14:10, 1F
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05/11 14:12, , 2F
05/11 14:12, 2F
→
05/11 14:12, , 3F
05/11 14:12, 3F
→
05/11 14:13, , 4F
05/11 14:13, 4F
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05/11 14:14, , 5F
05/11 14:14, 5F
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05/11 16:16, , 6F
05/11 16:16, 6F
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