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Math Help - Joint PMF Problem

  1. #1
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    Question Joint PMF Problem

    A balanced coin is tossed twice. Let X and Y denote the smaller and larger of the two faces, respectively.
    a)Find the PMF of X and Y
    b) make a table of the marginal and joint PMFs of X and Y
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  2. #2
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    Quote Originally Posted by durham2 View Post
    A balanced coin is tossed twice. Let X and Y denote the smaller and larger of the two faces, respectively.
    a)Find the PMF of X and Y
    b) make a table of the marginal and joint PMFs of X and Y
    This is just spadework. Use this table to get started: Dice table

    If you need more help, please explain what you can do and say where you get stuck.
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  3. #3
    MHF Contributor matheagle's Avatar
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    I'm lost, what do you mean larger of the two heads of a coin?
    I know that Mr Fantasy has a big head, but surely you aren't talking about that.
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    Quote Originally Posted by matheagle View Post
    I'm lost, what do you mean larger of the two heads of a coin?
    I know that Mr Fantasy has a big head, but surely you aren't talking about that.
    If only my eyes were in relative proportion to my head ..... I completely misread the question and saw dice instead of coins. The problem is not even spadework now (assuming a value is assigned to heads and a value to tails), more like gardening.

    I guess we'll know more when the OP replies.
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    Quote Originally Posted by matheagle View Post
    I'm lost, what do you mean larger of the two heads of a coin?
    I know that Mr Fantasy has a big head, but surely you aren't talking about that.

    Its meaning that X is the smallest and Y is the largest.
    so if you rolled the first die and it was a 5 and the second was a 3 the joint pmf would be zero because X can't be larger than Y because its the smallest. Just needed to make sure I did my problem right. Thanks for you post
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  6. #6
    MHF Contributor matheagle's Avatar
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    And I thought this was some weird aussie talk.
    Like down at the barbie
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