Một nhóm học sinh gồm nam và bạn nữ được xếp thành một hàng dọc. Xác suất để bạn nữ đứng cạnh nhau bằng :         

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Find a mistake in the four underlined parts of the sentence and correct it:

  I will like another cup of coffee, please!

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

  harm                    wash                         call                        talk

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

  perform                 series                     period                     stereo

• Find a mistake in the four underlined parts of the sentence and correct it:

  I found that the number of universities which accept foreign students have been increasing.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Never I have seen such an excited film.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The news are on TV soon.

• Choose the best answer for the following sentence:

  He is not only helpful but generous ___________________.

• Choose the best answer for the following sentence:

  I am punctual, ___________________?

• Choose the best answer for the following sentence:

  Go out with us, __________________________?

• Choose the best answer for the following sentence:

  On the first of next month, he _________________________ for five years.