A为什么错

这题的解释没看明白

老师 我是这样想的：我相信价格一直下降，所以看跌即short position，故以buy止损，所以选择C。这样理解哪里不正确？为什么这道题目选择C？

请问怎么用计算器按出来x？

麻烦老师分别解释一下BC选项

老师您好 在financial reporting 有一节 credit analysis，的indicator of firm credit，有一句话：scale and diversification: a company's sensitivity to adverse events, adverse economic conditions, and their factors. 请问 公司对于负面事情的反应程度 敏锐度与分散性有什么关系呀？不是很懂这一条

The following 10 observations are a sample drawn from a normal population: 25, 20, 18, –5, 35, 21, –11, 8, 20, and 9. The fourth quintile (80th percentile) of the sample is closest to: A 24. B 8. C 21. 这题为什么不用（n+1）*80*=8.8，在数第八和第九之间那样做呢？

请解释一下

这道题的知识点在哪

The following information is about the price earning (P/E) ratios for the common stocks held in a manager’s portfolio: The relative frequency and the cumulative relative frequency, respectively, for interval II are closest to: A Relative frequency is 20% ; Cumulative relative frequency is 85% B Relative frequency is 22%; Cumulative relative frequency is 36% C Relative frequency is 22%; Cumulative relative frequency is 85% 出错了。无答案