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Math Help - help me,please...

  1. #1
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    help me,please...

    1. A student studying for a vocabulary test knows the meanings of 12 words from a list of 20 words. If the test contains 10 words from the study list, what is the probability that at least 8 words on the test are words that tha student knows?

    Exams
    2. A biology quiz consist of 8 multiple-choice questions. 5 must be answered correctly to recieve a passing grade. If each questions has 5 possible answers, of which one is correct.What is the probability that a student who guesses at random on each
    Last edited by aura000; May 3rd 2008 at 03:03 AM.
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  2. #2
    Lord of certain Rings
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    Please do not double post. Double posting goes against the rules of the forum.

    You asked it here, http://www.mathhelpforum.com/math-he...me-please.html
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  3. #3
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    [quote=aura000;139915]I need help with probability .
    P.S. Thank you very much

    1. A student studying for a vocabulary test knows the meanings of 12 words from a list of 20 words. If the test contains 10 words from the study list, what is the probability that at least 8 words on the test are words that tha student knows?

    Exams
    2. A biology quiz consist of 8 multiple-choice questions. 5 must be answered correctly to recieve a passing grade. If each questions has 5 possible answers, of which one is correct.What is the probability that a student who guesses at random on each question will pass the examination?
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