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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## What is the probability of rolling two fair dice and tagged by: Vincen ##### This topic has 1 expert reply and 0 member replies ## What is the probability of rolling two fair dice and What is the probability of rolling two fair dice and having at least one die show an even number? A. 35/36 B. 3/4 C. 1/2 D. 1/4 E. 1/36 The OA is the option B. Why is 3/4? I don't understand how can I get this number? Experts, can you help me? Thanks in advanced. ### GMAT/MBA Expert GMAT Instructor Joined 25 May 2010 Posted: 14925 messages Followed by: 1855 members Upvotes: 13060 GMAT Score: 790 Vincen wrote: What is the probability of rolling two fair dice and having at least one die show an even number? A. 35/36 B. 3/4 C. 1/2 D. 1/4 E. 1/36 P(at least 1 even number) = 1 - P(2 odd numbers). Of the 6 numbers on a die, 1/2 are odd, 1/2 are even. Thus: P(2 odd numbers) = 1/2 * 1/2 = 1/4. P(at least 1 even number) = 1 - 1/4 = 3/4. The correct answer is B. _________________ Mitch Hunt Private Tutor for the GMAT and GRE GMATGuruNY@gmail.com If you find one of my posts helpful, please take a moment to click on the "UPVOTE" icon. Available for tutoring in NYC and long-distance. For more information, please email me at GMATGuruNY@gmail.com. Student Review #1 Student Review #2 Student Review #3 Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now. • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • FREE GMAT Exam Know how you'd score today for$0

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