571概率简单数值题short
All Labels Seen by Draw 5 1
题目
Draw 5 coupons independently and uniformly from 3 types. What is the probability that all 3 types have appeared at least once by time 5?
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提交作答时记录，用于后续平均用时统计。
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题目
Draw 5 coupons independently and uniformly from 3 types. What is the probability that all 3 types have appeared at least once by time 5?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案