今天是：2024年11月23日 星期六
中文版 >
Exercises 1-3 14
题目

Randomly pick times with replacement from integers from to , pick a number each time, and find the probability that the product of the numbers taken is divisible by .
解析

Solution: Solve based on classical concepts , addition principle , multiplication principle and properties of probability 3 and 6. Suppose event 

There is an even number among the  numbers taken out,

There are among the  numbers taken out,

Then the required probability is

主考点设置查询
标题
点评：0条
最新↓