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数学 高校生

(2)アが分かりません💦上の問題の時は紫の四角のようにXの値を掛け算して足してるのになんで今回の問題は掛けてないんでしょうか? 教えてください🙇‍♀️🙇‍♀️

000 期待値の基本 基本例題 58 袋の中に赤玉3個、白玉2個, 黒玉1個が入っている。 この袋から玉を2個 同時に取り出す。 赤玉1個につき1点, 白玉1個につき2点, 黒玉1個につ き3点もらえる。 このとき, もらえる合計点の期待値を求めよ。 CHART & SOLUTION 期待値 変量Xの値と、その値をとる確率の積の和 期待値 Exp+x+..+x" は, 次の手順で求める。 ① x~xn (とりうる値) を求める。 ② pin (①の各値に対する確率) を求める。 pit pet...+pn=1 を確認。 3 Exp+xz2+ +Xnpm を計算する。 解答 合計点をXとし, X =kのときの確率をr で表す。 Xのとりうる値は X=2, 3, 4, 5 P2² X=2 のとき 2個とも赤玉で X=3のとき 赤玉と白玉が1個ずつで p=3CıX2C1_ 6C2 4 -3CiXiC12C2_3+1 6C2 15 15 26C2 ← = X=4 のとき 赤玉と黒玉が1個ずつ、または2個とも白玉で P4= X = 5 のとき 白玉と黒玉が1個ずつで 6C2 15 X 2 3 確率 2 612077809 15 4 5 3 6 4 2 1515 15 15 ps= _2C1X1C1_2 6C2 15 したがって 求める期待値は 3 6 4 2x 15 +3× 15 +4× 15 +5X 15-5-3) 50_100円 2× 3X +5× (点) p.340 基本事項 計 1 3 +(374)9=3²456 約分しない(他の確率と 分母をそろえておく ) 方 が、後の計算がらく。 of BAT (1) BATOR (確率の和)=1 を確認。 もし、1にならなければ、 「とりうる値の抜け」, 「計算ミス」がある。 E OJOAMRS 27 NOS AUTO* P RACTICE 58 ② (1) 袋の中に赤玉3個、白玉2個, 黒玉1個が入っている。 この袋から玉を3個同時 に取り出すとき,その中に含まれる赤玉の個数の期待値を求めよ。 31 (2) 表に 1,裏に2を記した1枚のコインCがある。 (ア) コインCを1回投げ, 出る数xについて x2 +4を得点とする。 このとき、得点 の期待値を求めよ。 (イ) コインCを3回投げるとき, 出る数の和の期待値を求めよ。 Ins 基 C 0

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英語 高校生

英語です。 写真のwhenが副詞節になっているのに、 カンマが着いてない理由が分かりません。どなたか教えていただけるとありがたいです😖🙏🏻

¥56 演習 56 (問題→本冊: p.183) erusonoma odi MUSKUFREN I'm not sure how the boy got to my clinic but when I walked into the waiting room he was lovingly petting his cat lying in his lap. He had brought his sick cat in for me to heal. (881: k le det bi 【全文訳】 私はその男の子がどうやって私の診療所まで来たのかわからないが,私が待 合室に入って行ったとき、 彼は愛情を込めてひざで寝ている彼の猫をなでていた。 彼は,私に治療してもらおうと思って、 自分の病気の猫を連れてきたのだった。 【解説】 《 第1文 》 the but (等) I'm not sure [how the boy got(to my clinic)] SVi (否) C (疑・副) S Vi M 15407006 [when I walked (into the waiting room)] (接) S Vi M he was lovingly petting his cat (lying (in his lap)). S (副) Vt(進) O (現分) (Vi) M 副詞節であることを瞬時に見抜く。 when の前に関副 の先行詞になる 語はないから, 形容詞節にはなり得ない。 名詞節だとすると but は how-節と when-節をつなぐことになるが,そうすると he was lovingly petting ... という 節を I'm not sure….. の節につなぐ接続詞がないことになる。 これでは構造の説明 がつかない。つまり, when-節は名詞節ではなく、副詞節でなければならない。

解決済み 回答数: 1
英語 高校生

間違ってるとこあったら教えてください

英語 6 次のグラフ及び英文を読み、1から3の質問の答えとして最も適当なものを,それぞれ①~④ 23 のうちから一つずつ選びなさい。 解答番号は Not very familiar 18% Somewhat familiar 25% Not familiar 7% 21 Survey on Esports - 7 - Very familiar 50% Kazuhiro's dream is to be a professional esports player in the future. Esports stands for electronic sports. It is a form of video game competition. Sometimes tournaments for money are held and many people watch them online. Kazuhiro's friends introduced him to esports a few years ago, and he quickly became one of the best players among his friends. He has also participated in many local esports tournaments with them, and their team always won first or second place. Because of this experience, he started thinking of becoming a professional esports player. In one of his classes, Kazuhiro had to make a newsletter for his assignment. He decided to do a survey on esports. He found that some of his classmates were not familiar with esports. So, he thought he would try promoting it in his high school. He held an esports event for his classmates at school. He was not sure whether anyone would come to this event, but to his surprise, many students attended and enjoyed his workshop. He showed them some of the most famous video games in esports. He also gave them some advice on how to win. Finally, he did a live esports demonstration and played against a friend in another country. After this, a lot of his classmates asked Kazuhiro about esports. He felt pleased and satisfied with what he did. Now, he not only wants to be a professional esports player, but also be a person who can promote it. Through esports, he has been able to make friends all over the world, and he wants to spread the joy to other people. 2023KN1A-14-008 1 According to the pie chart, which of the following is true? 0 Less than 50% of the students are familiar with esports. 2 More than 90% of the students are not familiar with esports. 3 Twenty-five percent of the students are not familiar at all with esports. 4 Seventy-five percent of the students are familiar with esports. 2 According to the passage, which of the following is true about Kazuhiro? He wants to be a professional esports player. He wants to create a new video game in esports. He has a negative image of esports. 4 He has already won a lot of money from playing esports. 2 3 3 According to the passage, which of the following is true about Kazuhiro? He got confused when his friends asked him questions about esports. 2 He held an event to teach his classmates about esports at his school. 3 He was disappointed because not many people came to his workshop. 4 He learned about a professional esports player from his classmates. - 8 21 英語 22 23 2023KN1A-14-00

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