Combinations 2

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joannabanana: Master | Next Rank: 500 Posts; Posts: 118; Joined: Sun Sep 05, 2010 10:21 am; Location: Canada; Thanked: 5 times; GMAT Score:730

by joannabanana » Wed Dec 01, 2010 10:49 pm

There are three secretaries who work for four departments. If each of the four departments has one report to be typed out, and the reports are randomly assigned to a secretary, what is the probability that all three secretaries are assigned at least one report?

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Source: Beat The GMAT — Problem Solving | Wed Dec 01, 2010 10:49 pm

Testluv: GMAT Instructor; Posts: 1302; Joined: Mon Oct 19, 2009 2:13 pmFollowed by: 164 members; Location: Toronto; Thanked: 539 times; GMAT Score:800

by Testluv » Wed Dec 01, 2010 11:54 pm

https://www.beatthegmat.com/tough-probab ... 18-15.html

Hi,

I provided a couple of different approaches on the second page of the thread in the link above. Eli and Kevin also lent their insight.

Kaplan Teacher in Toronto

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