SAT官方每日一题附答案和解析[数学](2014年8月11日)
日期:2014-08-12 09:59
(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.
In the figure above, the length of line A B is 2 times x and the length of line B C is 3 times x. If a point is chosen at random from line A C, what is the probability that the point will lie on line B C?
(A) 2/5
(B) 1/2
(C) 3/5
(D) 2/3
(E) 5/6
答案和解析
答案：C
解析：
The probability that a point chosen from 
will lie on 
is the ratio of the length of 
to the length of 
. The length of 
is 
and the length of 
is 
, so the length of 
is 
. Therefore, the ratio of the length of 
to the length of 
is 
.
重点单词
