Coupon Collector Question:how many balls we need to throw to leave no empty bins? Let X;be the number of balls thrown until i bins are non-empty, given i-1 bins are already non-empty. X;is a geometric r.v.with parameter(n-i+1)/n. 公刘-X-店m-gn=m+o0mCoupon Collector Question: probability that every bin is not empty (h is onto)? Question: how many balls we need to throw to leave no empty bins? … Let Xi be the number of balls thrown until i bins are non-empty, given i-1 bins are already non-empty. Xi is a geometric r.v. with parameter (n-i+1)/n