What is the probability of exactly two heads?

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The sample space for tossing three fair coins is {HHH,HHT,HTH,HTT,THH,THT,TTH,TTT}. What is the probability of exactly two heads? 

Apr 29th, 2015

Probability = no. Two heads/ total tosses in sample space 

                 =. 3/8

Answer: 3/8   OR.    0.375

Apr 29th, 2015

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Apr 29th, 2015
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Apr 29th, 2015
Jun 22nd, 2017
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