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The number of ways is : \(\frac{9\cdot8\cdot7\cdot6\cdot5}{120}=126\) ( ways )

Ans:126 ways 

11 tháng 6 2016

Khi John lấy 5 quả bóng, kết quả có thể là 3 xanh và 2 đen. Chưa được 4 quả cùng màu.

Trong 3 loại đỏ, trắng, vàng còn lại, John phải lấy thêm ít nhất 10 quả nữa để chắc chắn có 4 quả cùng màu vì: 10 chia 3 bằng 3 dư 1. 4 quả ấy bao gồm 3 quả là Thương cộng 1 quả là Dư.

Vậy John phải lấy ít nhất 15 quả bóng để chắc chắn có 4 quả cùng màu.

5 tháng 8 2016

7 balls

31 tháng 7 2016

The number of balls to get off to a 3 color is:
3 + 3 + 1 = 7 (balls)
Answer: 7 balls

7 tháng 6 2018

Có một số quả bóng trong túi. Phần còn lại là 1 khi nhóm 3 quả bóng được lấy ra. Phần còn lại là 2 khi các nhóm 5 hoặc 7 quả bóng bị loại bỏ. Số lượng quả bóng nhỏ nhất có thể có trong túi là bao nhiêu?

10 tháng 8 2018

I feel you should answer yourself

7 tháng 11 2021

15 :V

7 tháng 11 2021

14

 

16 tháng 12 2021

35. should try different ways / so as to find out / of learning words / Language learners / the best way for themselves.

→ Language learners ……………………………… should trying different ways of learning words so as to find out the best way for themselves……………………………………………………

36. plant trees /in the school garden /and water them /We are going to /and flowers/ after class.

 

→ We are going to ………………………………………… plant trees and flowers in the school garden and water them every afternoon after class.……………………………………………

 

XIII.Read the following selection carefully, then say whether the statements are true (T) or false (F) (Hãy đọc kĩ đoạn văn sau, sau đó cho biết những câu phát biểu sau là đúng hay sai): MY MOST INTERESTING EXPENRIENCE I had a strange experience yesterday evening while returning home from school. I was attacted by a big crowd and when I reached it, I found that there was a magician who was giving some wonderful persformances. When I went up there, I saw him taking off his...
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XIII.Read the following selection carefully, then say whether the statements are true (T) or false (F) (Hãy đọc kĩ đoạn văn sau, sau đó cho biết những câu phát biểu sau là đúng hay sai): MY MOST INTERESTING EXPENRIENCE I had a strange experience yesterday evening while returning home from school. I was attacted by a big crowd and when I reached it, I found that there was a magician who was giving some wonderful persformances. When I went up there, I saw him taking off his hat elegantly and showing the lining inside to the audience to prove that there was nothing inside. He took back the hat and put it again on his head. A minute later, he took it off and strange to say, a rabbit jumped out. The crowd cheered a lot and put coins into the hat. He next took out of a bag three small rubber balls, threw them up in the air and caught them up in his hands. He showed his hands and the rubber ball to the crowd. But to our surprise when he next threw the balls in the air, the tree balls became five balls and soon there were seven of them. It was indeed a marvelous experience for me. 1.The writer (She) had a strange experience this morning. 2.She saw a magician surrounded by a big crowd of pople. 3. The mangician performed the show wit a hat and balls. 4. Lookers-on gave him money after the show. 5. Suddenly, a rabbit ran into the crowd. 6. After the magician’s show the balls became rabbits
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14 tháng 1 2017
1.The writer (She) had a strange experience this morning. F 2.She saw a magician surrounded by a big crowd of pople. T 3. The mangician performed the show wit a hat and balls. T 4. Lookers-on gave him money after the show. F 5. Suddenly, a rabbit ran into the crowd. F 6. After the magician’s show the balls became rabbits F