AMC8 1992
AMC8 1992 · Q11
AMC8 1992 · Q11. It mainly tests Averages (mean).
The bar graph shows the results of a survey on color preferences. What percent preferred blue?
柱状图显示了一项关于颜色偏好的调查结果。有百分之多少人喜欢蓝色？
(A)
20%
20%
(B)
24%
24%
(C)
30%
30%
(D)
36%
36%
(E)
42%
42%
Answer
Correct choice: (B)
正确答案：（B）
Solution
Answer (B): The total frequency for all colors is $50 + 60 + 40 + 60 + 40 = 250$. The frequency for blue is 60. Thus the percent that preferred blue is $60/250$, or 24%.
答案（B）：所有颜色的总频数为 $50 + 60 + 40 + 60 + 40 = 250$。蓝色的频数为 60。因此，偏好蓝色的百分比为 $60/250$，即 24%。
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