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Generalized analysis of the coupon collector problem with reset button
AIMS Mathematics 2026, 11(7): 19739-19748
Published: 15 July 2026
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In this paper, we study a generalized version of the coupon collector problem that includes a reset button, which restarts the collection process when it is drawn. We derive an explicit formula for the expected waiting time to collect all distinct coupons in the general case where standard coupons are drawn with arbitrary probabilities. Using this result, we reprove the recent expected waiting time formula by Jocković and Todić in [8] for the case where standard coupons have equal probabilities, which is expressed in terms of the beta function.

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