学年

教科

質問の種類

数学 高校生

数Aの問題です。 54,55の(1)、(2)の解き方を教えて下さい!

第1章 場合の数と確率 ② 54 a が 5個, bが3個、 cが2個の10文字全部を1列に並べるとき, 並べ方の 総数を求めよ。 p.35 55 次の問いに答えよ。 -p.36 98 (1)8個の数字 1,1,123333の全部を使って8桁の整数を作ると き、整数は何個作れるか。 (2) LETTER の6文字をすべて使って文字列を作るとき, 文字列は何個 作れるか。 56 次の問いに答えよ。 (1) 10チームが総当たり戦 (リーグ戦)を行うと, 試合総数は何通りあるか。 (2) 1枚の硬貨を7回投げるとき, 表がちょうど4回出る場合は何通りあ るか。 2 57 4 桁の自然数nの千の位、百の位、十の位, 一の位の数字をそれぞれ、 b,c, d とする。 次の条件を満たすnは何個あるか。 (1) a>b>c>d (2) a 例題 組合せの応用 4 TRIAL B 解 答 A組の生徒6人とB組の生徒4 くともB組の生徒1人を含む選び 考え方 「少なくともB組の生徒1人 ① B組の生徒1人以上を含む ② (4人の選び方の総数) (4 以下の解答は②の方針である。 4人の選び方の総数は 10C4= 10-9-8-7 4-3-2-1 4人全員がA組の生徒である選び方の総数は よって 求める選び方の総数は 210-15-11 参考 ① の方針では, 含まれる B組の生徒が1 て、次のように計算すればよい。 6C₁X₁C₁+CX Cat C 選ぶ p.38 ように

解決済み 回答数: 1
英語 高校生

合ってますか??至急お願いいたします!

A. 各文の( 1. Paul (7) played )内から適語を選び記号で答えなさい。 ( 1 *22) has played ) baseball when he was in junior high haven't seen) him since last Friday." "I heard 3. I (7) received have received) a letter from him six months ago. 1) have got) tickets for the concert just now. 4. I got 5. Someone (7) has had ) stolen my bike when I came back. 6. My grandparents 7 will have ) have ) been married for 50 years next month. 7. I realized I made ) had made ) a big mistake. 8. "You (7) must "OK.". school. 2. "I (7) didn't see he's been sick." must not) tell this story to anyone. It's a secret." 9. "Hello, can we talk now? "I'm busy now. (7) Can 1) May ) you call me back later?". 10. I asked him to come many times, but he (7) shouldn't wouldn't ) come. 11. "It's ten o'clock now. The train minute" 12. You played outside a lot. You 13. My father is overweight, so he (7) would should ) shouldn't ) come in a 301" u tall must 1) can't ) be hungry. should do more exercise. S 14. He (7) must not will not ) listen to his parents and always gets his どうしてもしない own way. 15. It's April now. It((7) can't have snowed Kyushu. 16. I failed the test. I (7) should study for the next one. 17. It was sunny. You (7) needn't take ) needn't have taken ) your umbrella. 18. The eggs (7) keep 19. My close friend (7) calls 20. Italian food (7) made 21. Wine is made (7) of ) from ) grapes. 22. Mr. Tanaka is known (7) to by) everyone. () should have showed) in should have studied ) harder are kept ) warm by male penguins. is called ) me Betty. was made ) for us by Alan last evening. la

解決済み 回答数: 1