问题
单项选择题
An energy analyst forecasts that the price per barrel of crude oil five years from now will range between $ 75 and $105. Assuming a continuous uniform distribution, the probability that the price will be less than $ 80 five years from now is closest to:（）
A. 5.6%.
B. 16.7%.
C. 44.4%.
答案
参考答案：B
解析：
[分析]： 连续型均匀分布的累积分布函数F(x)的计算公式为：
在本题中， [考点] 连续型均匀分布