Một hộp có 35 chiếc bút, trong đó số bút bi đen chiếm 20%. Số bút bi đỏ bằng số bút bi đen, còn lại là số bút bi xanh. Người ta bỏ thêm 5 chiếc bút bi xanh vào hộp. Tại thời điểm đó, số bút bi xanh chiếm số phần trăm tổng số bút có trong hộp là:

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  She can't stand __________________ under such terrible conditions.
   

• Choose the best answer for the following sentence:

  It is no use ____________________ over spilt milk.
   

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

  Which players are allowed holding the ball with both hands?

• Choose the best answer for the following sentence:

  ESL students from Asia often have great difficulty __________________ some English sounds.
   

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

  Our plans are getting much and more out of hand.

• Choose the best answer for the following sentence:

  She preferred _________________ rather than give up.
   

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

  The harder it rained, the stronger the wind blew.

• Choose the best answer for the following sentence:

  He prefers _________________ a walk to _______________ TV at home.
   

• Choose the best answer for the following sentence:

  The doctor persuaded the patient ______________________ in hospital for 3 more days.
   

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

  I feel the relationship between him and me is getting close and closer.