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A-pencil-case-contains-5-faulty-and-7-working-pens

Jul 3, 2015 — When a single die is rolled, the sample space is {1,2,3,4,5,6}. ... Probability of drawing 2 blue pens and 1 black pen = 4/9 * 3/8 * 3/7 = 1/14 ... A box contains 4 chocobars and 4 ice creams. ... The above solution is good but a little faulty because it considered only the possibility of obtaining a '1' on the first die ...












a-pencil-case-contains-5-faulty-and-7-working-pens


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