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[Problem Solving]
试题详情
题目：
The charge for a single room at Hotel P is 25 percent less than the charge for a single room at Hotel R and 10 percent less than the charge for a single room at Hotel G . The charge for a single room at Hotel R is what percent greater than the charge for a single room at Hotel G ?
选项:
A、15%
B、20%
C、40%
D、50%
E、150%
答案:
B
提问：
请问这题是怎么做的呢？我觉得k的范围大于等于12，k的概率是怎么算的呢？
谢谢！
解答：
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