困惑，始终想不通，帮忙分析下～～

麦兜woo

In Patton City, days are categorized as having heavy rainfall (more than two inches), moderate rainfall (more than one inch, but no more than two inches), light rainfall (at least a trace, but no more than one inch), or no rainfall.In 1990, there were fewer days with light rainfall than in 1910 and fewer with moderate rainfall, yet total rainfall for the year was 20 percent higher in 1990 than in 1910.

If the statements above are true, then it is also possible that in Patton City

A.the number of days with heavy rainfall was lower in 1990 than in 1910

B.the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910

C.the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910

D.the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910

E.the average amount of rainfall per month was lower in 1990 than in 1910
题目中给出heavy rainfall, moderate rainfall, light rainfall, or no rainfall四个等级，且说90年的moderate rainfall 和 light rainfall 的天数都比91年少，但总的雨量比91年多，问选项哪个可能对，答案A，90年heavy rainfall 的天数比91年少，想不通，（无雨量可以忽略不计）三个雨量的天数都比91年少，加起来这么会多于91年呢？

sdcar2010

It's a math problem since there is no upper limit for rainfalls in a single heavy rainfall day.  The sky is the limit.

麦兜woo

It's a math problem since there is no upper limit for rainfalls in a single heavy rainfall day.  The sky is the limit.

-- by 会员 sdcar2010 (2010/12/12 21:38:01)

Oh, I see. thanks a lot~