为了方便广大考生更好的复习，恒星英语网综合整理了SAT1备考数学练习，以供各位考生考试复习参考,希望对考生复习有所帮助。
Read the following SAT test question, then click on a button to select your answer.
At the Cross Street Convenience Store between 11 a.m. and 1 p.m. on Friday, a total of n items were purchased. The graph above shows the distribution of the number of items purchased in each of five categories. In terms of n, how many more sandwiches than pastries were purchased?
A.10n
B.20n
C. 
D. 
E. 
Correct Answer: C
Here"s Why:
Of the n items purchased, 30% were sandwiches and 10% were pastries. 30% of n is equal to 0.3n, and 10% of n is equal to 0.1n. Therefore, 0.3n – 0.1n = 0.2n, or more sandwiches than pastries were purchased.
Difficulty: Medium
Question Type: Standard Multiple Choice