A tricky question, kindly help!!

jennyshiqiao

38: GWD-29-Q35

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

The answer is A, which I can hardly understand!!

qindan

B,C和E是立刻可以推算出impossible的

D也是impossbile的：因为即使1990年下moderate rainfall的那些天下足了2 inches的雨而1910年下moderate rainfall的那些天只下 a little bit more than one inch，但是因为其moderate rainfall天数少于1910年，故不可能总雨量是其两倍以上

A是可能的，比如说1990年有一天下了10000000 inches，其他日子都不下2 inches以上的雨。这样就有可能满足前提假设

[此贴子已经被作者于2008-6-24 12:55:07编辑过]

五月十三

以下是引用qindan在2008-6-24 12:54:00的发言：

B,C和E是立刻可以推算出impossible的

D也是impossbile的：因为即使1990年下moderate rainfall的那些天下足了2 inches的雨而1910年下moderate rainfall的那些天只下 a little bit more than one inch，但是因为其moderate rainfall天数少于1910年，故不可能总雨量是其两倍以上

A是可能的，比如说1990年有一天下了10000000 inches，其他日子都不下2 inches以上的雨。这样就有可能满足前提假设

yes.

jennyshiqiao

Thanks so much!!!   I didn't consider that the rain can pour down in one day! 

Just as it can cause all the flooding problem now..