学年

質問の種類

数学 高校生

確率教えて欲しいです!! この問題を余事象を使わないで解くとどうなるか教えて欲しいです お願いします!

例題 119 X 直線上に4点 G1, A, B, G2 が図のように左 からこの順に間隔1で並んでいる. 動点Pが点 Aから出発して次の規則で移動する. 31 TIVE 254 「さいころを投げて、 1の目が出たら左に1だけ進み, その他の目が出た ら右に1だけ進む. ただし, G1, G2 をゴールとし, ゴールに到着した後は どの目が出ても移動しない.」 n回さいころを投げたときにPがゴールにいる確率をpmとする。nが 偶数のときと奇数のときのpをそれぞれ求めよ. 解答 無限級数と確率 MAN n回目までに G1, G2 に到着しないのは点の移動が次の場 合である . (i) 固定 CX 考え方 問題文から点Pが移動する規則を正確にとらえる. 「ゴールに到着した後はどの目が出ても移動しない」 Foug とあるので, n回目まで (1回目や2回目など) にゴール G1, G2 に到着しても,最終的 回さいころを投げるということに着目する。 に 1 2 3 4 5 6 A→B→A→B→A→B→A つまり, nが偶数のとき, n回目に点Aに, nが奇数のとき, n回目に点Bに それぞれ点Pがいるとき, まだゴールに到着していない. つまり、n回後にゴールにいる確率 (n回目までにゴールにいる確率)を求めるには、 その余事象 「n回後にゴールにいない」 確率を考えればよい. nが偶数のとき, 点Pがゴールにいない確率は, 52 したがって 求める確率は, 5 2 pn=1- G1 A 36 (ii) nが奇数のとき, 点Pがゴールにいない確率は, n-1 n-1 (3) ** (1) * 5 2 15 6 したがって 求める確率は, pn=1-2 (5) ²7² 636 B n-1 5/5\" 2 ¹ 636 * * * G2 (東京理科大・改) - A→B : 右に1移動 その確率は 6 A←B:左に1移動 1 11 6 その確率は 「1の目」と「それ以 外の目」が交互に出 るので、今回ずっと なる. 余事象 (n-1) 回目までが、 「「1の目」と「それ以 「外の目」が交互に出 るから 一回ずつ。 「AB」 回目には の移動なので、言

回答募集中 回答数: 0
英語 高校生

この問題の答えを教えて頂きたいです🙇‍♀️🙇‍♀️

1. 次の英文を読んで (1) ~ (5) の問いに答えなさい。 Have you ever dreamed of traveling in space? I have thought of going into space as an astronaut so many times. Traveling beyond the earth is always a great dream and hope for humanity. But as everyone knows, it is not easy to be an astronaut. There are many people who want to try to get into space flight programs all around the world. So first, you have to pass extremely difficult selection processes to even participate in the training and testing used to prepare potential astronauts for operating in and living F ) in space. The training itself is so hard that it is very difficult (A) complete. ( those that pass the training, only a few can actually experience the trip into space. Every time I see the news about the manned space flights on TV, it does sound like something impossible for a regular person like me. (G ), there was a recent event that really surprised me in September 2021. They 2completed said that ("Crew Dragon" 3the 3 day-mission 5called) the spacecraft successfully. As a surprise, this mission was an "All- Civilian" flight. The four people in the Crew Dragon were not professional astronauts from other space agency programs. A billionaire booked the Crew Dragon capsule last year and picked three normal people to ride (B) him. It was the VERY first totally private mission to orbit. The stories of how the people had been chosen and how the trip succeeded were not only amazing but also very heart warming. Watching this news reminded me (C) the excellent idea about Space elevators. This is a promising scientific technology that could take us into space much more (K) in the future. ( H ) JSEA (Japan Space Elevator Association), the concept of a Space elevator would make reaching orbit in space easier and faster (D) using Centrifugal force and Earth's gravity instead of rockets. Engineers estimate it requires a cable that is about 100,000km long and more than 100 times as strong as steel. So of course, it sounds like a challenging development. Also, the space elevator would require much less energy to lift cargo and people into orbit and be significantly more eco-friendly. As they continue to work on advancing technology, the space elevator may become a reality (E) we know it. With the space elevator, traveling into space would no longer be an impossible dream for us, ordinary people. Just talking about it, I get totally excited and can't help hoping to experience the situation of looking down on the earth from the space one day. (E)に入る前置詞として適切なものを①から⑤か (1) 本文中の(A) らそれぞれ選びなさい。 Dwith 2to 3before 4 by 5 of P.1

解決済み 回答数: 1
英語 高校生

エレメント2のレッスン6のComprehensionとVocabularyの答え教えてください

96 Comprehension Life 2. Bruce Edwards changed A Reading for main ideas: Choose the best answer. 1. What is the main idea of the passage? a The development of the role of caddies. bThe fighting spirit necessary for athletes. The friendship between a golfer and a caddy. B Reading for details: Fill in the blanks with the words in the box below. There a unnecessary words. Then divide the paragraphs into the following sections. 11 9 3 4 5 16 Caddy for Life 1 2 8 10 a the way people saw caddies b his career from a golfer to a caddy golf courses so that golfers could play safely There was a very (1. ) caddy called Bruce Edwards. ) from high school, he started to work for Tom Watson as a Caddies used to just carry the golf bag for golfers, but Bruce always (3. After Bruce (2. condition of the course. Bruce was also not afraid to (4. ) with the golfer. ), Watson wanted to play less, so Bruce decided to work for Greg After many (5. Bruce missed Watson, and he decided to return to Watson after three years ( After they started to play together again, Bruce began to have some (7. Bruce was (8. ) with ALS, but he continued to caddy for Watson. ) at the US Open. Introduction Becoming Watson's caddy ( Separation and reunion Deadly diagnosis ( The last chance together in the spotlight ( Epilogue ) ) ) Vocabulary A Choose the correct definition 1. What's the distance from 2. I'm glad we have this opp 3. It was heartbreaking to 4. My aunt was taken to hos 5. His name now became a making you (b) the amount an unimpo d a chance to relating to C Listening for details: Listen to the statements and answer T(true) or F(false). 1.( ) 2. ( ) 3. ( ) 5. ( ) 4. ( Both Watson and Bruce (9. 2. Could you move over Watson and Bruce knew this could be their last time together in the (10. Could you move ou Watson asked for (11. ) to do more research on ALS, and Bruce w 3. They sat down and t ) for having someone like Watson with him. (12. They sat down an Paragraph Organization ) B Choose the correct word for 1. She strongly (disagree 2. Is there a (direct / dir Words diagnosed / disagree / exam funding/special/sorro separation /health/spoti thankful/graduated victories / weaker/appea D Retelling the story: Look at the pictures on pages 92-93, and retell the story. 3. He was (desperate / d- C Fill in the blanks to rephra 1. The teacher is now co- The teacher is now - 4. If you really want th If you really want 5. He finally admitted He finally ( - Tips caddy caddy は caddie と綴られる for a golfer)」を意味するとと caddy for a golfer)」 という意 として使えるかどうかをまず推

回答募集中 回答数: 0