Một đội gồm nam và nữ. Lập một nhóm gồm người hát tốp ca, tính xác suất để trong người được chọn có ít nhất nữ.  

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  I’ve been here for two hours, and I’m still waiting.
  
  

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

  I’ve arranged to fly to Nha Trang this weekend.
  
  

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

  Mr. Pike intends to resign before the end of the month.
  
  

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

  We haven’t done any gardening for five months.
  
  

• Choose the word that has the underlined part pronounced differently from the rest:

  apologize                excited                    polite                    decision

• Choose the word that has the underlined part pronounced differently from the rest:

  says                ways                     plays                       stays

• Choose the word that has the underlined part pronounced differently from the rest:

  attend                    decent                      acceptable                     expression

• Choose the word that has the underlined part pronounced differently from the rest:

  thing                      length                      either                          author

• Choose the word that has the underlined part pronounced differently from the rest:

   look                  school                        good                        wool

• Choose a word that has different stress pattern:

  discuss                  visit                     begin                 respond