问题如下图：
选项：
A. 
B. 
C. 
D. 
解释：
题目有误，提干不全
NO.PZ2019040801000019问题如下A survey shows th30% of the offices have printers in this builng. Assuming a binomiprobability stribution, whis the probability thexactly three businesses will have a printer in a ranm selection of five businesses?A.0.0338.B.0.0576.C.0.1323.0.1424.C is correct.考点二项分布解析5个办公室里3个有打印机的概率是:[5! / 3!(5-3)!]*(0.3)3*(0.7)5-3 = 10*(0.027)*(0.49) = 0.1323怎么知道是C（3，5）不是C（5，3）
NO.PZ2019040801000019问题如下 A survey shows th30% of the offices have printers in this builng. Assuming a binomiprobability stribution, whis the probability thexactly three businesses will have a printer in a ranm selection of five businesses?A.0.0338.B.0.0576.C.0.1323.0.1424.C is correct.考点二项分布解析5个办公室里3个有打印机的概率是:[5! / 3!(5-3)!]*(0.3)3*(0.7)5-3 = 10*(0.027)*(0.49) = 0.1323二项分布没找到这个公式
NO.PZ2019040801000019 0.0576. 0.1323. 0.1424. C is correct. 考点二项分布 解析5个办公室里3个有打印机的概率是: [5! / 3!(5-3)!]*(0.3)3*(0.7)5-3 = 10*(0.027)*(0.49) = 0.1323为什么要乘以0.7的2次方
