SAT数学题概率题求解答If n and p are to be selected at random from sets N and P respectively,what is the probability the n/(2p) will be a member of set 求讲解解题思路N {12,18,2,6}P {1,4,2,3}
问题描述：
SAT数学题概率题求解答
If n and p are to be selected at random from sets N and P respectively,what is the probability the n/(2p) will be a member of set
求讲解解题思路
N {12,18,2,6}
P {1,4,2,3}
答
因为数量很少,我觉得想不出高明的方法也可以用笨方法：1、看看每一个n除以2p能得到几个属于P的结果：12有2个（除以2*2和2*3）,18有1个（除以2*3）,2有1个（除以2*1）,6有2个（除以2*1和2*3）,加起来一共6个.2、排列...