user-avatar
phuchaukute605
2 năm trước
Trong hộp có 12 viên bi: 4 viên bi màu đỏ, 5 viên bi màu vàng, 3 viên bi màu trắng. Chọn ngẫu nhiên ra 2 lần (không hoàn lại): lần 1 chọn 2 viên bi, lần 2 chọn 1 viên bi (tổng cộng chọn được 3 viên bi). Tính xác suất để 3 viên bi chọn được có cùng 1 màu
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Change into passive voice 84.The teacher corrects our exercises at home. 85.Alice gave me a wonderful present. 86.They are building several new schools in our town. 87.We have made great progress in industry, science and medicine. 88.Sam killed a lion last week. 89.You must hand in your report before the end of this month. 90.I had just finished the job when the factory closed 91.No one has opened that box for the past hundred years. 92.She is going to mail these letters soon. 93.He should finish the report yesterday. 94.My students have met their friend at the station. 95.They didn’t allow Tom to take these books home 96.The teacher won’t correct exercises tomorrow. 97.How many trees did they cut down? 98.This well-known library attracts many people 99.All students attended the meeting. 100.People say that he is intelligent. 101.He can’t repair my bike. 102.Many has operated Tome since 10 o’clock. 103.Smith has taught us French for 2 years. 104.They didn’t look after the children properly. 105.Nobody swept this street last week. 106.People drink a great deal of tea in England 107.People speak English all over the world. 108.Tom was writing 2 poems. 109.She often takes her dog for a walk. 110.She didn’t introduce me to her mother. 111.Farmers usually milk cows twice a day. 112.He likes people to call him “sir” 113.Our teacher used to bid us talk in class. 114.We can’t go along here because the road ..................... a.Is repairing b. is repaired c. is being repaired d. repairs. 115.The story which I’ve just read ........................... Agatha Christie. a.Was written was written c. was written from wrote by

II. Choose the correct word A, B, C or D for each gap to complete the following passage. Today, computer companies sell many (1) ______ programs for computers. First, there are programs for (2) ______math problems. Second, there are programs for scientific studies. Third, some programs are (3)______fancy typewriters. They are often used by writers and business people. (4) ______programs are made for courses in schools and universities. And (5) ______there are programs for fun. These include word games and puzzles for children and adults. 1. A. differ B. different C. differently D. difference 2. A. do B. to do C. doing D. to doing 3. A. like B. as C. so D. same 4. A. Another B. The other C. Other D. The others 5. A. next B. after that C. however D. finally III. Read the text and then answer the questions. SCOTLAND - THE LAND OF LEGENDS Scotland is in the north of Great Britain. It is famous for its rich culture as well as its amazing natural beauty. Visitors to this land can spend endless days exploring its historic centuries-old castles. But be aware – legend says that some of them are haunted by ghosts. Fun-lovers can experience its world-famous festival, the Highland Games where they can enjoy unique Scottish activities such as the piping, drumming, and dancing. They can also see traditional sports, or drink whisky with the local people. Driving through vast green pastures, or boating on scenic lakes – or lochs – are other attractions that Scotland offers. The great people of this legendary land have also given many of the world’s important inventions like the telephone, the television, penicillin and the raincoat. Edinburgh, the capital, was the first city in the world to have its own fire brigade in 1824. Edinburgh University welcomed the first female medical student in Great Britain in 1869. 1. Is Scotland famous for its rich culture? 2. What might you see while you are exploring a castle? 3. What are some activities you can see at the Scottish Highland Games? 4. Which first city in the world has its own fire brigade ? PART D - WRITING I. Complete the second sentence so that it means the same as the sentence before: 1. We are going to plant a lot of trees in the park. → A lot of ……………………………….…………………………. 2. I don’t have enough money, so I can’t buy this car. → If………………………………………………..………………… 3. Although they were tired, they tried to finish their work on time. → In spite of………………………………………………………… 4. “I don’t like this picture very much,” he said. → He said that………………………………………………………. 5. His room is untidy, so his mother isn’t happy. → Because……………………………………………………………. Mn giúp mik vs, mik cảm ơn nhìu

1. Tim is a(n) ------------------author who has written over a dozen ------------------- novels in the last ten years. 2. Many said that Steven would never achieve his ---------------- , but after overcoming many------------------ , he is now a famous record producer. 3. Wearing his --------------------- around his neck, the proud team captain carried the championship-------------------- off the pitch. 4. Reports say the family----------------------- was greatly increased when they sold the property, making a -------------------- of over a million pounds. 5. Being a millionaire, he owns------------------- all over the country, and his wife wears designer clothes and ---------------------------. 6. The actor succeeded in becoming famous because he was---------------------------- and he had learnt ---------------------- lessons at drama school.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team