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Math Help - probability ?

  1. #1
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    probability ?

    what are the odds in favour of each events?

    a) getting a number greater than 1 when a number cube labelled 1 to 6 is rolled
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  2. #2
    Super Member craig's Avatar
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    Quote Originally Posted by hscott4 View Post
    what are the odds in favour of each events?

    a) getting a number greater than 1 when a number cube labelled 1 to 6 is rolled
    Number of different outcomes is 6.

    The amount of values that are greater than 1, 5 (2, 3,...6)

    Therefore the probability is 5 out of 6 or \frac{5}{6}, assuming the dice/number cube is fair.
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  3. #3
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    Quote Originally Posted by hscott4 View Post
    what are the odds in favour of each events?

    a) getting a number greater than 1 when a number cube labelled 1 to 6 is rolled
    Pr(X > 1) = 5/6.

    Now read this: Odds - Wikipedia, the free encyclopedia
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  4. #4
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    thank you very much, but could you make it step by step so I understand it please??

    2) Getting a 2 when a card is randomly picked from a deck of playing cards.

    3) Getting the sum 5 when two number cubes labelled 1 to 6 are rolled and the numbers are added.
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  5. #5
    MHF Contributor matheagle's Avatar
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    2. n/N =4/52=1/13
    Number of favourable events divided by total number of events.

    3. same here... n/N=4/36=1/9
    There are 6 times 6 total out comes, but you want just the four...
    (1,4), (2,3), (3,2), (4,1), where the pairs represent the two dice.
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  6. #6
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    Hello, hscott4!

    Do you mean "odds" . . . or "probability"?
    They are two different concepts.


    What are the odds in favour of:

    a) getting a number greater than 1 when a number cube labelled 1 to 6 is rolled.

    There are six possible outcomes: . \{1,2,3,4,5,6\} . . . all equally likely.

    There are five outcomes greater than 1: . \{2,3,4,5,6\}


    The probability of a number greater than 1 is: . {\color{blue}\frac{5}{6}}

    The odds in favor of a number greater than 1 is . {\color{blue}5:1}

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