566概率简单数值题short
Time to Reach 3 Distinct Types 1
题目
Coupons arrive uniformly from 7 types. What is the expected number of draws needed to see 3 distinct types for the first time?
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
题目
Coupons arrive uniformly from 7 types. What is the expected number of draws needed to see 3 distinct types for the first time?
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