情報 プロローグ 1日目 2日目 3日目 4日目 5日目 6日目 7日目 8日目 エピローグ 終了 / 最新
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[メモ記入/メモ履歴] / 発言欄へ
計算方法がよくわからないな……………
1/5×1/5×1/5×1/5=1/625
4/5×4/5×4/5×4/5=1/625
はわかる。他はよくわからん
>>496
0回お賽銭を入れる確率 256/625=4/5×4/5×4/5×4/5
1回お賽銭を入れる確率 256/625=1/5×4/5×4/5×4/5 ×4
(1の場合と2の場合と3の場合と4の場合なので×4)
2回お賽銭を入れる確率 96/625=1/5×1/5×4/5×4/5 ×6
(1〜4の中で2回5が出る。1-2、1-3、1-4、2-3、2-4、2-5の6パタン)
3回お賽銭を入れる確率 16/625=1/5×1/5×1/5×4/5 ×4
(1の場合と2の場合と3の場合と4の場合なので×4)
4回お賽銭を入れる確率 1/625=1/5×1/5×1/5×1/5
さーて、またログの海に飛び込んでこよーかな
今日の水着は...スクール水着にしよーっと
[...スクール水着には『4年3組れでぃあ』と名札がついている]
じゃー、逝ってきマース!どっぽーん!
[...勢いよくログの海に飛び込んだ]
>>499例えば一回お賽銭入れる場合順番1〜4までのそれぞれのパターンであるので
1○2×3×4×
1×2○3×4×
1×2×3○4×
1×2×3×4○
の4パターンあるので1/5×4/5の三乗×4になるのだったと思います
他も同様だったと思います(←説明下手)
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[メモ記入/メモ履歴] / 発言欄へ
情報 プロローグ 1日目 2日目 3日目 4日目 5日目 6日目 7日目 8日目 エピローグ 終了 / 最新