标题: thanks a lot in advance. i have some puzzle math question. [打印本页] 作者: wunaigmat 时间: 2002-5-24 10:13 标题: thanks a lot in advance. i have some puzzle math question.
your ealy reply would be highly appreciated. you are good boy. a cool job
pls give me some idea to those kind questions.
给出标准方差公式,有一组数1,3,5,7。。。19 ,现在变动一下,问新表准方差
A,B,C,D,E的MEAN是16,E为40,且E>D>C>B>A, 求C的最大可能值
有一题答案不确定的: 某餐厅有2种不同水果, 6种不同蛋糕, 若餐后甜品每次都以a same number of kinds of fruit and cake, 则该餐厅有几种餐后甜点? 根据我的理解, C2,1C6,1+C2,2C6,2=12+15=27。27为选项E。选项B为12。