让paypal坑死了# Money - 海外理财
k*n
1 楼
刚毕业还会,现在都忘了。。
6 sided die, you roll 3 times, what's the probability of rolling the same
number all 3 rolls? Rolling a six all three times?
5 people go out to dinner, all different ages, what are the chances they
will sit around the table in age order in either direction
呵呵。。只有自己推。。但不知对不对。。
6 sided die, you roll 3 times, what's the probability of rolling the same
number all 3 rolls? Rolling a six all three times?
5 people go out to dinner, all different ages, what are the chances they
will sit around the table in age order in either direction
呵呵。。只有自己推。。但不知对不对。。