 what is the probability of getting a 7 or 11 on two dice. %? - XP Math - Forums Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment  XP Math - Forums what is the probability of getting a 7 or 11 on two dice. %? 08-16-2007 #1 jessie0420 Guest   Posts: n/a what is the probability of getting a 7 or 11 on two dice. %? what is the probability of getting a 7 or 11 on two dice. %?  08-16-2007 #2 Shura Join Date: Mar 2006 Posts: 12 Probability of getting a 7 or 11 with two dice. Well, The number of combinations of two dice are 6x6=36. There are 6 ways of getting 7 (6, 1)(1, 6)(5, 2)(2, 5)(4, 3)(3, 4). So the probability of getting a seven is 6/36 or 1/6 or 16.67% to 2 decimal places. In fact 7 is the most common total of two dice, but even then it only occurs just under 17% of the time. There are 2 ways of getting 11 (6, 5) and (5, 6) So the probability of getting 11 is 2/36 or 1/18 or 5.56% to 2 decimal places. So the probability of getting 7 or 11 is (6+2)/36. The 6 ways of getting 7 plus the two ways of getting 11 out of 36 the number of total combinations of two dice. This simplifies to 8/36 = 2/9 or 22.22% to decimal places. But probabilities are usually written as a decimal with 1 being 100% certain. So I would write. P(of getting a 7 or 11) = 0.22 (to 2 decimal places) -- Shura __________________ "Mathematics is the gate and key to the sciences." -- Roger Bacon  Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
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