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Math Help - is this right?

  1. #1
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    is this right?

    What is the probability that if 5 students are randomly selected, without replacements, the first 3 are taking less than 8 units and the last two are taking at least 8 units.

    I got 1395/2461 x 1394/2460 x 1393/2459 AND FOR the last 2 taking at least 8 units, 1066/2458 x 1065/2457.

    Did I do this right?



    Attached Thumbnails Attached Thumbnails is this right?-919.png  
    Last edited by Past45; September 19th 2012 at 06:19 PM.
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  2. #2
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    Re: is this right?

    No, there are not two different answers. The probability that, of 5 people, they are as said, is the product of all 5 fractions.
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  3. #3
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    Re: is this right?

    Quote Originally Posted by HallsofIvy View Post
    No, there are not two different answers. The probability that, of 5 people, they are as said, is the product of all 5 fractions.
    I didn't write it properly, I didn't mean AND, like it is meant to be a different problem I was just bringing up the second group. I got a total of .034 when I divided and multiplied them all up.
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