user-avatar
tuanskyx5
2 năm trước
Một hộp đựng 8 quả cầu màu đỏ, 7 quả cầu màu xanh và 6 quả cầu màu vàng (chúng chỉ khác nhau về màu). Lấy ngẫu nhiên 4 quả cầu từ hộp. Tính xác suất để trong 4 quả cầu đó phải có đủ 3 màu khác nhau ?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1. The hotel has been demolished. We spent our honeymoon in that hotel. (WHERE) -> _________________________________________________________________________________ 2. The couple posted a Christmas present to their daughter. Their daughter lives in South Africa. (WHO) -> _________________________________________________________________________________ 3. We will have to cancel the show. We are trying to sell more tickets. (UNLESS) -> _________________________________________________________________________________ 4. I know what really happened. You do, too. (BOTH….AND -> _________________________________________________________________________________ 5. I felt he was wrong. I didn’t say so at the time. (ALTHOUGH) -> _________________________________________________________________________________ 6. Mrs. Weaver had to work full-time. She had to earn a living for herself and her family of five children. (SO AS TO) -> _________________________________________________________________________________ 7. He is a bad-tempered person. No one can work with him for long. (SUCH) -> _________________________________________________________________________________ 8. Jill has been invited to the party. Kate has been invited to the party. (WELL) -> _________________________________________________________________________________ 9. The teacher came into the room. Everyone stops talking. (WHEN) -> _________________________________________________________________________________ 10. We have seen a lot of changes. The changes are good for business. (WHICH) -> ________________________________________________________

Chuyển sang bị động : 1. He will let her go to the bus station. …………………………………………………………………… 2. Don’t let your children play with matches. …………………………………………………………………… 3. Hien let Van take her hat. …………………………………………………………………… 4. Don’t believe what he has just said. …………………………………………………………………… 5. They make the child work all day. …………………………………………………………………… 6. You have to choose the right way or you must change your direction. …………………………………………………………………… 7. Don’t let the clothes be under the hard rain. …………………………………………………………………… 8. People reported that some roads collapsed. …………………………………………………………………… 9. They were going to feed the tiger in the cages. …………………………………………………………………… 10. Tien told me to give him a hand. ……………………………………………………………………

1:Mary is the……….in her class. A:tall B: tallest C:taller D: the taller * 1 điểm A B C D 2: In Viet Nam, it is normally……………. in the South than in the North. A. hot B. hotter C. hottest D. hoter * 1 điểm A B C D 3: The food is …………… than the last time I ate it. A. badder B. bad C. worse D. worst * 1 điểm A B C D 4: Ho Chi Minh city is ………….. than Hanoi. A. big B. bigger C. biggest D. biger * 1 điểm A B C D 5: Jack is now …………….. than he used to be. A. happy B. happier C. happiest D. happyer * 1 điểm A B C D 6. Detective books are………………… than science fiction ones. A. more interesting B. interestingly C. interstinger D. interesting * 1 điểm A B C D 7. That T-­shirt is the …………… we have in stock. A. big B.bigger C. small D. smallest * 1 điểm A B C D 8. This hat is the ……………… of all. A. expensivest B. more expensive C. cheapest D. cheaper * 1 điểm A B C D 9. This book is the ………………… of all. A. bored B.boring C. more boring D. most boring * 1 điểm A B C D 10. He is …………. at maths than at any other subjects. A. better B. more good C. goodlier D. gooder * 1 điểm A B C D

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