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Math Help - (workers)x(rate)x(time) = jobs problem

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    (workers)x(rate)x(time) = jobs problem

    The second period College Algebra class of 33 students could do n problems in x hours. If 3 students were absent, how long would it take to do 100 problems?
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    Quote Originally Posted by robinpatrick View Post
    The second period College Algebra class of 33 students could do n problems in x hours. If 3 students were absent, how long would it take to do 100 problems?
    The average student does n/(x.33) problems per hour (total of n problems done in: 33 times x hours of student effort).

    Therefore to do 100 problems with 30 students would take h hours where:

    100/(h.30) = n/(x.33),

    or rearranging:

    h = 100.x.33/n = 3300.x/n

    RonL
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