110年 - 110 國立政治大學_碩士班招生考試_金融學系財務工程/金融科技組:統計學B#105692

科目：研究所、轉學考(插大)◆統計學 | 年份：110年 | 選擇題數：0 | 申論題數：20

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申論題 (20)

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■ Let X be the number of weeks before the prices change in a grocery store and p be the probability of updating the prices in a given week. The pricing decision is independent between any two weeks. If the distribution of X is described by

where x =r, r+ 1, The average duration of prices in this store is __(3)__ if r=1.

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