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Help with Probability Word Problem4

label Algebra
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What is the probability of obtaining exactly three tails in four flips of a coin, given that at least two are tails? (Enter the probability as a fraction.)

Oct 23rd, 2017

TTTH  HTTT  THTT  TTHT

Required probability = 4 /16

                                = 1/4

Dec 2nd, 2014

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Oct 23rd, 2017
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Oct 23rd, 2017
Oct 23rd, 2017
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