Trong một buổi liên hoan có 10 cặp nam nữ, trong đó có 4 cặp vợ chồng. Chọn ngẫu nhiên 3 người để biểu diễn một tiết mục văn nghệ. Xác suất để 3 người được chọn không có cặp vợ chồng nào là           

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose one sentence that has the same meaning as the root one:

  “Cigarettes?” he asked. “No, thanks,” I said.
  
  

• Choose one sentence that has the same meaning as the root one:

  The doctor said, “You really ought to rest for a few days, Jasmine.”
  
  

• Choose one sentence that has the same meaning as the root one:

  “I will pay back the money, Gloria” said Ivan.
  
  

• Choose one sentence that has the same meaning as the root one:

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

• Choose one sentence that has the same meaning as the root one:

  “Would you like to come to my birthday party, Sarah?” asked Frederic.
  
  

• Choose one sentence that has the same meaning as the root one:

  “If I were you, I would take the job,” said my room-mate.
  
  

• Choose one sentence that has the same meaning as the root one:

  “Leave my house now or I’ll call the police!” shouted the lady to the man.
  
  

• Choose one sentence that has the same meaning as the root one:

  He last had his eyes tested ten months ago.
  
  

• Choose one sentence that has the same meaning as the root one:

  “You should have finished the report by now,” John told his secretary.
  
  

• Choose one sentence that has the same meaning as the root one:

  “It’s too stuffy in this room, isn’t it?” said the guest.