14.Suppose you place 5 coins at random on squares of a 5 \x02 5 grid (so there are 25 squares),with no two coins permitted to occupy the same square.(a) What is the probability that no two coins are placed in the same row?(b) What is the probability

题目详情

14.Suppose you place 5 coins at random on squares of a 5 \x02 5 grid (so there are 25 squares),
with no two coins permitted to occupy the same square.
(a) What is the probability that no two coins are placed in the same row?
(b) What is the probability that no two coins are placed in the same row,and no two
coins are placed in the same column?

▼优质解答

答案和解析

no two coins in the same square：C(25,5)
each row one coin：5^5
no same row or column,：5!

看了 14.Suppose you...的网友还看了以下：

阅读答案“Cool”is a word with many meanings．Its old me 　2020-05-13 …

Consumers want their incomes to __ so as to keep 　2020-05-16 …

3道英语语法题1.Help youself!All the food ( ) good.A.tas 　2020-05-16 …

With what ____ the car is ____ I want to know.选择A 　2020-05-16 …

Linda is ______ music at home A.listening b.liste 　2020-05-16 …

When i was a child,i used to spend a lit of time_ 　2020-05-16 …

they ,with,ask,for,me,them,to,stay,a,week连词成句2、lu 　2020-05-16 …

1.Will you ask me to go with you?(作否定回答)2.I will 　2020-05-17 …

I'm familiar ______the music that they are dancing 　2020-06-04 …

reconcile用法?with还是to?Itisdifficulttoreconcilethis 　2020-07-22 …