2013-08-12 15:00:00 来源: Collegeboard 责编:楷维留学指南
2013年8月11日SAT考试官方每日一题
SAT真题类型:Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
If Kelly buys
pens priced at
dollars each and
pens priced at
dollars each, which of the following expresses, in terms of
and
, the average (arithmetic mean) price, in dollars, of these pens?
(A) ![]()
(B) ![]()
(C) ![]()
(D) ![]()
(E) ![]()
2013年8月11日SAT考试官方每日一题答案:D
解析:
The average price of the pens is equal to the total price of all of the pens divided by the total number of pens. There are
pens priced at
dollars each, so the total price of these pens is
dollars. There are
pens priced at
dollars each, so the total price of these pens is
dollars. Thus the total price of all of the pens is
dollars, and the total number of pens is
, the average price, in dollars, of all of these pens is
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