wu :: forums « wu :: forums - easy? probability » Welcome, Guest. Please Login or Register. Nov 28th, 2024, 6:01am

RIDDLES SITE WRITE MATH! Home Help Search Members Login Register

wu :: forums    riddles    easy (Moderators: towr, SMQ, william wu, Grimbal, Eigenray, Icarus, ThudnBlunder)    easy? probability « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: easy? probability  (Read 538 times) fatball Senior Riddler Can anyone help me think outside the box please?     Gender: Posts: 315 easy? probability   « on: Dec 10th, 2007, 10:50am » Quote Modify In a bag there is a 3 black balls and 2 white balls.   One ball is drawn at random and then replaced.   In three successive draws ,what is the chance that only white balls are drawn IP Logged SMQ wu::riddles Moderator Uberpuzzler     Gender: Posts: 2084 Re: easy? probability   « Reply #1 on: Dec 10th, 2007, 11:02am » Quote Modify Because the draws are independent, you can just multiply probabilities: (2/5)*(2/5)*(2/5) = 8/125.   --SMQ IP Logged --SMQ 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 »

Powered by YaBB 1 Gold - SP 1.4!
Forum software copyright © 2000-2004 Yet another Bulletin Board