标题:
GWD19~Q16~概率问题~
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作者:
chchencheng
时间:
2011-8-12 06:57
标题:
GWD19~Q16~概率问题~
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
?
答案是1/2。
我做出来是2/5,肯定是方法有问题了。
请NN帮忙,谢谢~
作者:
rockstonexS
时间:
2011-8-12 20:01
满足条件的个数:5X3=15
总个数5X6=30
作者:
chchencheng
时间:
2011-8-14 07:43
好的,谢谢!
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