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wu :: forums    riddles    easy (Moderators: SMQ, towr, william wu, Icarus, Grimbal, ThudnBlunder, Eigenray)    1, 3, 6, 7 « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: 1, 3, 6, 7  (Read 644 times) Noke Lieu Uberpuzzler pen... paper... let's go! (and bit of plastic)     Gender: Posts: 1884 1, 3, 6, 7   « on: Sep 13th, 2010, 11:35pm » Quote Modify How many ways can you place 17 balls (labelled 1-17) in 4 baskets such that the baskets have either 1, 3, 6 or 7  in them? IP Logged a shade of wit and the art of farce. towr wu::riddles Moderator Uberpuzzler Some people are average, some are just mean.     Gender: Posts: 13730 Re: 1, 3, 6, 7   « Reply #1 on: Sep 14th, 2010, 12:39am » Quote Modify I think it's 17!/(1!3!6!7!)*4! IP Logged Wikipedia, Google, Mathworld, Integer sequence DB Grimbal wu::riddles Moderator Uberpuzzler     Gender: Posts: 7527 Re: 1, 3, 6, 7   « Reply #2 on: Sep 14th, 2010, 8:50am » Quote Modify Agree.   The  factor  4!  would apply only if the baskets are distinct (i.e. it matters which basket has 1 ball in it). IP Logged Pages: 1  Reply Notify of replies Send Topic Print Forum Jump: ----------------------------- riddles -----------------------------=> easy   - medium   - hard   - what am i   - what happened   - microsoft   - cs   - putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese « Previous topic | Next topic »

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