SAT数学每日一题 12月21日

2022-06-03 23:46:45

  下面是一道

  Read the following SAT test question, then click on a button to select your answer.

  There are n students in a biology class, and only 6 of them are seniors. If 7 juniors are added to the class, how many students in the class will not be seniors?

  A.n – 3

  B.n – 2

  C.n – 1

  D.n + 1

  E.n + 2

  答案及解析

  Correct Answer: D

  Here's Why:

  At first, there are n students in the class, and 6 of them are seniors. It follows that initially n – 6 students are not seniors. If 7 juniors are added to the class, there will be n – 6 + 7, or n + 1, students in the class who are not seniors.

  Difficulty: Medium

  Question Type: Standard Multiple Choice

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