AMC 8 2012 Problem 20

AMC8 2012 年第 20 题

比与比例★★★☆☆

What is the correct ordering of the three numbers $5/19, 7/21$, and $9/23$, in increasing order?

，和,

A. $\displaystyle \hspace{.05in}\frac{9}{23}<\frac{7}{21}<\frac{5}{19}\quad$
B. $\displaystyle \hspace{.05in}\frac{5}{19}<\frac{7}{21}<\frac{9}{23}\quad$
C. $\displaystyle \hspace{.05in}\frac{9}{23}$
D. $\displaystyle \hspace{.05in}\frac{5}{19}<\frac{9}{23}<\frac{7}{21}\quad$
E. $\displaystyle \hspace{.05in}\frac{7}{21}$

正确答案 · Correct Answer

B

解析 · Solution

解析整理中

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