Statistics

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How many sequences contain exactly three heads when you flip a coin five times? my answer was 15 but apparently I am wrong

2
15
10
8
12

  • Statistics -

    HHHTT
    HTHHT
    HTTHH
    HHTHT
    HHTTH
    HTHTH
    TTHHH
    THTHH
    THHTH
    THHHT

    Can you think of any other sequences?

  • Statistics -

    httth

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