math

please let me know the probability that in five tossess, a coin shows heads at least 3 times in succession?

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  1. could be
    HHHTT
    THHHT
    TTHHH
    HHHHT
    THHHH
    HHHHH

    Each of those is (1/2)^5 = 1/32
    so the prob(your event) = 6(1/32) = 3/16

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