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    Probability

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    A class is given a list of 20 study problems from which 10 will be part of an upcoming exam. If a given student knows how to solve 15 of the problems, find the probability that the student will be able to answer,

    a. All 10 questions on the exam
    b. Exactly 8 questions on the exam
    c. At least 9 questions on the exam

    © BrainMass Inc. brainmass.com March 4, 2021, 5:38 pm ad1c9bdddf
    https://brainmass.com/statistics/probability/calculating-probability-situation-combination-3503

    Solution Preview

    All the possibilities of choosing 10 questions out of 20 problems is 20!/(10!10!).
    a. The student can answer all 10 questions, then the 10 questions are chosen from 15 problems that the student knows. There are totally 15!/(10!5!) choices. ...

    Solution Summary

    The solution addresses - A class is given a list of 20 study problems from which 10 will be part of an upcoming exam. If a given student knows how to solve 15 of the problems, find the probability that the student will be able to answer,

    a. All 10 questions on the exam
    b. Exactly 8 questions on the exam
    c. At least 9 questions on the exam

    $2.49

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