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    jenni1971's Avatar
    jenni1971 Posts: 2, Reputation: 1
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    #1

    Jul 11, 2012, 04:56 PM
    if one of the subjects is randomly selected find the probability of selecting someone
    if one of the subjects is randomly selected find the probability of selecting someone who did not wear a helmet and was injured


    head injuries not injured
    wore helmet 96 656
    no helmet 480 2330
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jul 12, 2012, 02:57 AM
    Find the number of subjects who did not wear a helmet and were injured, divide this by the total number of subjects and you get the probability.
    jenni1971's Avatar
    jenni1971 Posts: 2, Reputation: 1
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    #3

    Jul 12, 2012, 08:00 AM
    OK so I would divide 3562 by 480 because 480 didn't wear helmets and were injured and 3562 was the total number of people I got 7.42 is that correct
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    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Jul 12, 2012, 08:33 AM
    Read my post again to see which number should be divided by which number.

    Remember that probabilities must always be between 0 and 1 inclusive.
    nzu's Avatar
    nzu Posts: 1, Reputation: 1
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    #5

    Oct 29, 2013, 01:17 PM
    3466\3562 or 0.973048849
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