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标题: GWD19-16 [打印本页]

作者: starryshen 时间: 2006-8-3 07:02 标题: GWD19-16

Q16:

M = {-6, -5, -4, -3, -2}

T = {-2, -1, 0, 1, 2, 3}

If an integer is to be randomly selected from set M above and an integer is to be randomly selected from set T above, what is the probability that the product of the two integers will be negative?

A. 0

B. 1/3

C. 2/5

D. 1/2

E. 3/5

这个题是不是用 3*6/6*6 呀？？^-^

作者: mikejia 时间: 2006-8-3 09:51

m里只有5个数

作者: efficiency 时间: 2006-8-3 21:18

是3*5/6*5

作者: starryshen 时间: 2006-8-7 13:02

many thanks !!!!

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