Gọi là tập hợp tất cả các số tự nhiên có chữ số. Chọn ngẫu nhiên một số từ tập . Tính xác suất để chọn được số chia hết cho và chữ số hàng đơn vị là số nguyên tố:         

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  decrease                    peaceful                 weather                  eastern

• Choose a word that has different stress pattern:

  throughout                  remain                     explain                  effort

• Choose a word that has different stress pattern:

  pollutant                  national                   extinction                   responsible

• Choose the best answer for the following sentence:

  The concert _____________ I listened last weekend was boring.

• Choose the best answer for the following sentence:

  My uncle has five hunting dogs, _______________ is ten years old

• Choose the best answer for the following sentence:

  I don't know the reason _____________ she hasn't talked to me recently.

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

  The film was really interesting. They are talking about it.
  
  

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

  Last Sunday I returned to my native village. I was born there.
  
  

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

  stream             spread              heat            teach

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

  splash            shrank              nature              gasoline