Counting - 16 gifts for 4 children - version 1 - The Beat The GMAT Forum

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Counting - 16 gifts for 4 children - version 1

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pm; Location: Vancouver, BC; Thanked: 5254 times; Followed by:1268 members; GMAT Score:770

by Brent@GMATPrepNow » Mon Feb 16, 2009 3:24 pm

Please note that this is not an official GMAT question; it’s my attempt to create difficult (650+ level) GMAT-style questions for this forum.

Brent Hanneson - Creator of GMATPrepNow.com

Source: Beat The GMAT — Problem Solving | Mon Feb 16, 2009 3:24 pm

tini: Junior | Next Rank: 30 Posts; Posts: 27; Joined: Sat Dec 29, 2007 1:37 am; Thanked: 2 times; Followed by:1 members

by tini » Mon Feb 16, 2009 4:39 pm

16c4 x 12c4 x 8c4 x 4c4 x 4p4 = (16!)/(4!)^4

ans c??

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pm; Location: Vancouver, BC; Thanked: 5254 times; Followed by:1268 members; GMAT Score:770

by Brent@GMATPrepNow » Mon Feb 16, 2009 4:48 pm

Nice work. The answer is C.

Here's my full solution:

Brent Hanneson - Creator of GMATPrepNow.com

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