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probability :prep

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Intern
Joined: 27 Mar 2009
Posts: 12

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07 Apr 2009, 05:44
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Tanya prepared 4 different letters to be sent to 4 different addresses. For each letter, she prepared an envelop with its corrct address. If the 4 letters are to be put into the 4 envelops at random, what is the propbability that only 1 letter will be put into the envelop with its correct address.

1/24 1/8 ¼ 1/3 3/8

pl explain little.
Senior Manager
Joined: 21 Apr 2008
Posts: 479
Schools: Kellogg, MIT, Michigan, Berkeley, Marshall, Mellon

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12 Apr 2009, 06:35
Hi,

please use search engine in orde to avoid having posts repeated

ps-combinatorics-76210.html?highlight=tanya+prepared+4+letters

Thanks
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Re: probability :prep   [#permalink] 12 Apr 2009, 06:35
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