作者flara (冰火五重天)
看板GRE_Verbal
标题Re: [计量]想请问三题PP3的数学题
时间Mon Apr 30 22:52:05 2007
※ 引述《nukchichi (haha)》之铭言：
: 不好意思~想问三题pp3的计量题~~想了很久...还是解不出来~~
: 照片上的答案是对的~~
: 1.汤的比例大小问题
: http://www.wretch.cc/album/show.php?i=nukchichi&b=2&f=1444998970&p=0
假设 Soup T里面的saturated fat=X, polyunsaturated fat=Y, 则 Soup S 里面的
saturated fat= X-2, polyunsaturated fat=Y-2. 题目中已经告诉你两种汤都
含有这两种成分，所以X>0，Y>0，X-2>0，Y-2>0。=而saturated fat大於
polyunsaturated fat，所以X>Y。
(X-2)/(Y-2) - X/Y=[ (X-2)Y -(Y-2)X ]/ [Y(Y-2)]=[2(X-Y)]/[Y(Y-2)] >0
: 2.客人人数问题
: http://www.wretch.cc/album/show.php?i=nukchichi&b=2&f=1444998971&p=1
假设客人有X人，X/3 + X/4 + X/6 = 36
4X + 3X + 2X = 12*36
9X = 12*36
X= 12*4=48
: 3.图形问题
: http://www.wretch.cc/album/show.php?i=nukchichi&b=2&f=1444998972&p=2
(a) 20-year-old male ~1.9 million people. 20*1.9=38
(b) 20-year-old female ~1.9 million people. 20*1.9=38
(c) 60-year-old male ~1.1 million people. 60*1.1=66
(d) 60-year-old female ~1.2 million people. 60*1.2=72 <---greatest
(e) 80-year-old female ~0.5 million people. 80*0.5=40
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 63.246.176.158
1F：推 nukchichi:谢谢噜!第二题看来我会错意了>"< 140.122.238.20 04/30 23:09
2F：推 nukchichi:谢噜!!我搞懂了the sum of the ages = =140.122.192.252 05/01 11:36