课程查询
大华雅思
大华雅思
SAT1官网每日一题之数学篇(七)
sat考试官方网站每日一题小结,以下是SAT1数学部分。
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
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

大华雅思