位置:首页 > SAT > SAT每日一题 > 正文
SAT官方每日一题附答案和解析[数学](2015年10月28日)
日期:2015-10-28 13:03

(单词翻译:单击)

每日一题

Mathematics>Standard Multiple Choice

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

Every student who studies art in a certain school receives exactly one of the grades A, B, C, or D. If 1/5 of the students receive A's, 1/4 receive B's, 1/2 receive C's, and 10 students receive D's, how many students in the school study art?

(A) 30
(B) 60
(C) 100
(D) 200
(E) 500

答案和解析

答案:D

解析:

The students who receive A's, B's, and C's account for (1/5) + (1/4) + (1/2) of the students, that is, 19/20. This leaves 1/20 of the students receiving D's. You know that 10 students receive D's, so 10 is 1/20 of the total. This means that the total number of students is 10 times 20, or 200.

分享到
重点单词
  • certainadj. 确定的,必然的,特定的 pron. 某几个,某
  • multipleadj. 许多,多种多样的 n. 倍数,并联