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    A family is selected at random and the family has 4 children.
    The genders in successive births are independent.
    At each birth theprobability to have a female child is p.


    (a) Define the random variable X representing the number of female children the family has.

    (b) Give the probability mass function of X and sketch it as a graph.

    (c) Give the cumulative distribution function of X and sketch it as a graph


    No idea how to even begin this question
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    (Original post by TwiMaster)
    A family is selected at random and the family has 4 children.
    The genders in successive births are independent.
    At each birth theprobability to have a female child is p.


    (a) Define the random variable X representing the number of female children the family has.

    (b) Give the probability mass function of X and sketch it as a graph.

    (c) Give the cumulative distribution function of X and sketch it as a graph


    No idea how to even begin this question
    Hint, you have a number of trials n=4 and a probability p, perhaps... binomial.
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    (Original post by Zacken)
    Hint, you have a number of trials n=4 and a probability p, perhaps... binomial.
    Binomial?! I would've never guessed that :/
 
 
 
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