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3 October, 18:50

You flip 3 coins. Is the probability of obtaining 2 heads and 1 tail in any order the same as the probability of obtaining a head, than a head then a tale?

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  1. 3 October, 21:12
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    the probability of obtaining 2 heads and 1 tail in any order is higher than the probability of obtaining a head, than a head then a tail

    Step-by-step explanation:

    since the probability (p) of obtaining 2 head and 1 tail in any order is

    P1 = p of obtaining (H, H, T) + p of obtaining (H, T, H) + p of obtaining (T, H, H) = 3*p of obtaining (H, T, H)

    assuming a fair coin then p heads = p tails = 0.5

    thus since each flip is independent from the others

    p (H, H, T) = p (H, T, H) = p (T, H, H) = P=0.5*0.5*0.5 = 1/8

    thus P1 = 3*1/8=3/8

    while the probability of obtaining a head, than a head then a tail is

    P2 = p of obtaining (H, T, H) = 1/8

    then P1=3/8 >P2=1 (8

    therefore the probability of obtaining 2 heads and 1 tail in any order is higher than the probability of obtaining a head, than a head then a tail
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