= Coupon collector's problem
{wiki=Coupon_collector's_problem}
The Coupon Collector's Problem is a classic problem in probability theory and combinatorics. It deals with the scenario where a collector seeks to acquire a complete set of coupons, with each coupon representing a unique item out of a finite collection. Each time a coupon is obtained (through purchase, random selection, etc.), it is equally likely to be any one of the available coupons. \#\#\# The Problem 1. **Setup**: There are \\( n \\) different types of coupons.
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