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    A fair coin is flipped five times (Probability)

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    A fair coin is flipped five times.

    The probability of getting exactly 2 heads is?
    The probability of getting at least 2 tails is?
    The probability of getting at most 3 tails is?
    The probability of getting either 3 heads or 3 tails is?

    Note Details:
    I'd like to see the method(s) used to get the results. Please show all formulas and details.

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    https://brainmass.com/statistics/probability/fair-coin-flipped-five-times-probability-15139

    Solution Preview

    a) P (2H) = 5C2 * .5^2 * .5^3 ( Note the formula is nCr * p^r * q^(n-r). Here n= total no of events , r = favorable events , p = prob of success , q = 1-p.
    <br> P ( 2h) = .3125 ( after ...

    Solution Summary

    The expert examines a fair coin is flipped five times in probability.

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