NO.PZ2021062201000008
问题如下:
Gerd Sturm wants to sponsor a contest with a $1 million prize. The winner must pick the stocks that will be the top five performers next year among the 30 stocks in a well-known large-cap stock index. He asks you to estimate the chances that contestants can win the contest.
What are the chances of winning if the contestants must pick the five stocks in the correct order of their total return? If choosing five stocks randomly, a contestant’s chance of winning is one out of:
选项:
A. 142,506
B. 17,100,720
C. 24,300,000
解释:
B is correct. The number of permutations is the number of ways to pick five tocks out of 30 in the correct order:
您好,按照我的理解,这道题的题干第二段包含两个问题,第一个问题是排列问题,选择B,第二个问题是组合问题,随机从30支股票中选出5个,答案选择A?