Từ một hộp chứa 10 quả cầu màu đỏ và 5 quả cầu màu xanh, lấy ngẫu nhiên đồng thời 3 quả cầu. Xác suất để lấy được 3 quả cầu màu xanh bằng:             

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  The children couldn't go swimming because the sea was too rough.         

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  The girl didn’t have any friends. Therefore, she felt lonely.         

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  "Leave my house now or I'll call the police!" shouted the lady to the man.         

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  They have collected the tests and checked the answers.           

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  Machines have taken the place of the people who used to do this kind of work.         

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions:

  Amanda has improved a lot this term.           

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest inmeaning to each of the following questions:

  The boy became so confused and worried that he left home.  

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest inmeaning to each of the following questions: 

  The children ran to the field to see the dragon, but it was no longer there.  

• Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest inmeaning to each of the following questions:

  I got the impression that the boys were not enjoying themselves.   

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the followingquestions:

  His eel soup is better than any other soups I have ever eaten.