AMC 8 1985 Problem 5

AMC8 1985 年第 5 题

统计与数据图表★☆☆☆☆

The bar graph shows the grades in a mathematics class for the last grading period. If A, B, C, and D are satisfactory grades, what fraction of the grades shown in the graph are satisfactory?

柱状图显示了一个数学班上个评分周期的成绩。如果 A、B、C 和 D 是及格成绩，图表中显示的及格成绩占几分之几？

AMC 8 1985 Problem 5 figure

A. $\displaystyle \frac{1}{2}$
B. $\displaystyle \frac{2}{3}$
C. $\displaystyle \frac{3}{4}$
D. $\displaystyle \frac{4}{5}$
E. $\displaystyle \frac{9}{10}$

正确答案 · Correct Answer

C

解析 · Solution

解析整理中

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