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確率

確率の問題 (解法求む)

日曜日, 10月 25th, 2015

【問題】
ある地域で天気の観測を始める。
この地域では毎日25%の確率で雨が降るものとする。
日曜から土曜、全ての曜日で雨を観測できるまでにかかる日数の期待値は?