问题如下图：
选项：
A. 
B. 
C. 
解释：
a选项什么意思呢？什么叫permutation formula
NO.PZ2015120604000104 问题如下 Following scriptions are regarto the binomistribution, whione is most correct? A.When we compute probabilities, the permutation formula is use B.The probability of zero in the binomistribution mnot zero. C.It is a continuous probability stribution. B is correct.If the ranm variable X is zero, it esn't methe probability of X must zero. 如上
能一下B吗？
二项分布不是n次的伯努利试验的结果么？为什么不是normstribution？ 因为X取值范围不是负到正无穷？有点混淆了麻烦帮忙理清
请问为什么C是错的呢？
排除法做对了，请问B是什么意思呢？
