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mathmath333
 one year ago
There are 6 different letters and 6 correspondingly addressed envelopes.
If the letters are randomly put in envelopes ,what is the probablity that
exactly 5 letters go into the correct addressed envelope ?
mathmath333
 one year ago
There are 6 different letters and 6 correspondingly addressed envelopes. If the letters are randomly put in envelopes ,what is the probablity that exactly 5 letters go into the correct addressed envelope ?

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mathmath333
 one year ago
Best ResponseYou've already chosen the best response.1\(\large \color{black}{\begin{align} & \normalsize \text{There are 6 different letters and 6 correspondingly addressed envelopes.}\hspace{.33em}\\~\\ & \normalsize \text{If the letters are randomly put in envelopes ,what is the probablity that}\hspace{.33em}\\~\\ & \normalsize \text{exactly 5 letters go into the correct addressed envelope ?}\hspace{.33em}\\~\\ \end{align}}\)

mathmate
 one year ago
Best ResponseYou've already chosen the best response.1P(5)=0 because it is impossible to have exactly 5 going into the correct envelope. The remaining (sixth) must be correct as well.

paki
 one year ago
Best ResponseYou've already chosen the best response.0Montmort's matching problem....

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.1but the condition when 6 letters are in the correct envelopes also includes 5 letters case.

amilapsn
 one year ago
Best ResponseYou've already chosen the best response.1\[\href{ https:///www.google.com/search?q=exactly&ie=utf8&oe=utf8 }{\Huge\sf Exactly}\]

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.1anyway but the answer given in book is zero.

mathmate
 one year ago
Best ResponseYou've already chosen the best response.1What @amilapsn meant is "what is the probablity that \(\Large exactly\) 5 letters go into the correct addressed envelope." So 6 letters correctly placed is excluded.
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