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A fair coin is flipped 4 times. What is the probability of observing (i) at least one head (ii)
no more than two heads, (iii) a run of two or more consecutive tails?
Solution
p(H) = 4/16 =1/4 p(not moe than 2 heads) =2/16 =1/8 p(two or more conse tails)
=3/16

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