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    ahmad_bd's Avatar
    ahmad_bd Posts: 1, Reputation: 1
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    #1

    Jul 24, 2007, 05:51 PM
    Math 9 The Probability Formula
    hi.. I neeed helpp.

    one ball is drawn from a bag containing 1 yellow, 2 oranges, 3 pink and 2 whitemarbles. State the probability of the folllowing colours. Write your answers in decimal form. Explain each step and how u did it please. Thanks a lot - ahmad. Desperate of help test is tomorrow I really need it. :( :confused:

    a) P(white) b) P(pink) c) P(yellow) d) P(orange)
    Superfly999's Avatar
    Superfly999 Posts: 235, Reputation: 14
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    #2

    Jul 24, 2007, 05:59 PM
    We could help you by showing the real answer if you show an attempt :P. Here are some questions that might help: How many marbles are there in all? If you wanted to pick up a yellow one what would your chance be? (how many yellows are there and how many marbles are there in all?)

    Here is a probability formula:

    P(A) =

    The Number Of Ways Event A Can Occur
    ___________________________________

    The Total Number Of Possible Outcomes



    Simple version for this problem:

    Number of said colored marbles
    ___________________________

    Number of total marbles

    Here is the website I got the first formula from and it will probably help you more than I can. Probability
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #3

    Jul 25, 2007, 11:42 AM
    There are 8 marbles total. Out of those there are 2 white one. Therefore, the probability of picking a white is 2/8=1/4. See? Use similar technique on the other questions. See?
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