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Math Help - Two Probability Questions

  1. #1
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    Two Probability Questions

    Question 1: What is the probability of rolling a pair of six sided dice five times and getting four 4's.

    Question 2: If 10 eligible voters are randomly chosen what is the probability that at least four voters will vote for party A


    My Answers:

    #1
    Rolling 1 four is 3/36 = 1/13.
    Then I get lost on what comes next.

    #2
    I get all mixed up on to what should be the actual numbers that im multiplying on the denominator and numerator. I'm thinking the denominator should be (10,4).
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  2. #2
    Newbie Flatiron's Avatar
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    Re: Two Probability Questions

    In both cases I believe that you need to use the binomial distribution (probability of x successes in n trials).
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  3. #3
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    Re: Two Probability Questions

    Quote Originally Posted by staceylynnxx View Post
    Question 1: What is the probability of rolling a pair of six sided dice five times and getting four 4's. .
    This is simply binomial:
    N=5,~s=4,~p=\tfrac{1}{13}~.
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