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标题: 哪位好心的NN能帮忙解答一下吗?多谢了!!! [打印本页]

作者: qiuqiaomm    时间: 2006-10-1 08:59     标题: 哪位好心的NN能帮忙解答一下吗?多谢了!!!

1.一数列平均数46,标准方差4,问:which value is exactly 1.5 standard deviations from the arithmetic mean of the set?  答案:50

2.一人在卡片上写了12020个整数,然后每次任意抽一张不放回,为保证他抽出的所有卡片数字和为偶数,问要抽多少张?答案:12

3.一个连续数列 问中间又没有数是8multiple

A 9-15

B 10个数


作者: bobiouou    时间: 2006-10-1 18:53

3. A you don't know for sure

B yes if there is 10 number in a serie there must be a number that's / by 8 so B






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