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8月13号机考归来 [复制链接]

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发表于 2007-8-25 08:21:24 |显示全部楼层
thanks a lot for the posting.
for the 1st Q, shouldnt'  it be       radius*perimeter   (without the 1/2???)
and are the figures given in the test normally to scale? or we can't assume anything unless stated??
once again congrat!!!!!!!
many thanks

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发表于 2007-8-25 08:29:23 |显示全部楼层
sorry but one more question
for standard deviation   in the square root sign, should we divide everything by N or (N-1)????
many thanks
PS: sorry , I could only type Eng on this stupid comp.

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发表于 2007-12-9 06:44:10 |显示全部楼层

回复 #1 gregre1984 的帖子

8. two words, utah and another word with five letters but has only letter 'a' in common with utah.  choose one letter from each word, what's the probablity that two same letters are chosen.
answer is 1 / 20.

I think the answer should be 1/25

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发表于 2011-2-8 02:33:44 |显示全部楼层
好贴,顶~要是有南欧的机经就更赞了!

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RE: 8月13号机考归来 [修改]

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8月13号机考归来
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