math

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katy will flip 3 pennies once.How many possible outcomes for this compound event are there?

What is the probability that all 3 pennies will land on tails?

  • math -

    HHH
    HHT
    HTH
    HTT
    THH
    TTH
    THT
    TTT

    So, what do you think?

  • math -

    There are 2^3 = 8 possibilities (permutations) if the order of appearance is important.
    HHH
    HHT
    HTH
    HTT
    TTT
    THT
    TTH
    TTT
    There are 4 combinations (0,1,2 or 3 tails)
    The probability of TTT is 1/8

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