Grade

Type of questions

Mathematics Senior High

問題文の意味がいまいち理解できないです。そもそもKを、得点として終了するのだから得点は必ずKになるのでは無いのですか?教えて頂きたいです。

1からnまでの数字を1つずつ書いたn枚のカードが箱に入っ ている.この箱から無作為にカードを1枚取り出して数字を記録し, 箱に戻すという操作を繰り返す.ただし,回目の操作で直前のカー ドと同じ数字か直前のカードよりも小さい数字のカードを取り出し た場合に,k を得点として終了する.2≦k≦n+1を満たす自然数 kについて,得点がk となる確率を求めよ 東北大の一部 とする. カードの取り出 《解答》 カードの数字を出た順に a1, A2,A3, し方は全部でnk通りある.このうち ... * A1 < A2 < A3 < ... < ak となる場合は,a から ak までの数字の組み合わせはnCk通りで, 並べ方は 小さい順に1通り,それ以外は任意だから,この場合の確率は nck nk よって, 求める α < az <a3 <・・・ < ak-1 ≧ak となる確率は, a1 < Q2 < Q3 <… < ak-1 / ak (実際は ak-1 以降の大小は任意だから ai < az < az <・・・ <ak-1 と同じ)となる確率から ・・・ < ak-1 < ak となる確率を引いたものだから a1a2a3 <... nCk-1 1= nk-1 nCk nk n! = = = .k-1 n -1(n-k+1)!(k-1)! n!.n.k-n!(n-k+1) nk(n-k+1)!k! n!(n+1)(k-1) nk(n-k+1)!k! (k-1) (n+1)! nkk!(nk+1)! = n! nk(n-k)!k! n!(nk-n+k-1) nk(n-k+1)!k!

Solved Answers: 2
English Senior High

【完了形】これの大問2番なんですけど、過去完了と過去形どうやって見分けたらいいんですか(泣)詳しくそのコツを教えて下さい

第 7 章 完了形 (2) P.27-35 [B FACTBOOK 1 Put the words in the correct order and complete the sentences. Change the verb the correct form. Ex. [out/he/go/just] when I arrived. He had just gone out when I arrived. 1) [Malaysia/she/in/live] before she came to Japan before she came to Japan. 21 057 2) I noticed [the taxi/I/in/leave / my umbrella ]. I noticed I wasn't hungry because [ lunch/I/ have / just ]. I wasn't hungry because 2. Change the verb into the correct form and complete the sentences. a) The house was very quiet when I got home. Everybody bed. (go) b) I felt very tired when I got home. I a) I missed the class. The train hour. (be) b) The train (be) 3) a) We were very proud that she b) She to straight to bed. (go) 3) 057 delayed for more than one 2) 041 05 delayed for one hour and it was very crowded. the silver medal. (win) the silver medal, but she wasn't very happy. (win) 3) 041 0 Read a sentence and complete the second sentence with the words given. Change th verb into the correct form. Ex. It is 10 o'clock now. When we get there, [start/ already / the film ]. When we get there, the film will have already started. We will leave early tomorrow. [breakfast/we/ already / eat] when you get up. The sky is beginning to clear up. this evening/this rain / by/stop ]. 1) 0 when you get up. 2)

Solved Answers: 1
English Senior High

合ってるか見てください🥲‎

演習 1. My dream is to ( @learn ) how to play the piano. learning ③learned □ 2. ( ) is possible to work online from anywhere in the world. ①That ②t ③What (酪農学園大) have learned (亜細亜大 ) Such 3. ペンギンが飛ぶのは不可能だ。 語順整序 (a penguin / fly/for/is/impossible/it/to). It is impossible for a penguin to fly. 4. 彼女はイギリスのテレビ番組を理解するのは難しいとわかった。 (difficult / she / it / understand / found / to) British TV shows. She found it difficult to understand 5. 何を言ったらいいのかわからなかった。 I didn't (say/to/know / what). Know what to say 6. It was typical ( ①on ②to ) him to get angry about it. ③3 with (名城大) ( 広島修道大 ) (東北芸術工科大) (東洋大) of 7. She wants to come to Japan ( ). ①worked having work to be work to work ( 九州産業大) 8. 彼はその試験に合格するために一生懸命に勉強した。 blue wish (大) (in/the/ worked/ examination / order / he / pass / hard / to). He worked hard in order to pass the examination. 9. We will have to be quiet ( ) wake the baby. (福岡大) ①as so not to ③so as not to 2 as to not so ①not so as to 10. She drove to the airport, ( ) to find that her flight had been cancelled. Donly ⑥in in or in order (3 so blan 11. His story about the painter was interesting to ( ). Obe listened 3 listen ④as (駒澤 (天理 be listened to listen to

Solved Answers: 1
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