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28 January, 10:14

Toss a coin 5 times. what is the probability of getting exactly 2 tails

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  1. 28 January, 10:19
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    The total number of outcomes is (1/2) ^5 dice each of the 5 coin tosses is an independent event. From the 5 possible tails, exactly 2 tails need to be selected. So the favored outcome is 5C2 = (5*4) / (1*2) = 10. The probability is 10/32 = 5/16.
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