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wu :: forums    riddles    medium (Moderators: SMQ, william wu, Icarus, ThudnBlunder, towr, Grimbal, Eigenray)    No dice pair to add up to seven « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: No dice pair to add up to seven  (Read 451 times) gkwal Newbie     Posts: 25 No dice pair to add up to seven   « on: May 3rd, 2007, 11:27am » Quote Modify What is the probability of no two dices summing up to 7 at throw of N dices? IP Logged Grimbal wu::riddles Moderator Uberpuzzler     Gender: Posts: 7527 Re: No dice pair to add up to seven   « Reply #1 on: May 3rd, 2007, 1:23pm » Quote Modify For a large N It would be close to (1/2)N-3 IP Logged Eigenray wu::riddles Moderator Uberpuzzler     Gender: Posts: 1948 Re: No dice pair to add up to seven   « Reply #2 on: May 3rd, 2007, 7:15pm » Quote Modify And even closer to 8/2n - 12/3n + 6/6n. 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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