送交者: HunHunSheng 于 2008-08-01, 13:39:57:
回答: 整个地球寿命中地震次数不是无穷多。 由 Amsel 于 2008-08-01, 13:14:20:
God make an earthquake when x is an integer while x follows normal distribution.
Let Y be the number of earthquakes, then
Y=1 if x is an integer Y=0 if X is not an integer.
So there are only two possibilities for 地震次数.
Prob(Y=1)=0 but Y=1 still can happen.