math

posted by thomas

Linda did 24 problems out of 25 correctly.In the next test she did twice as many examples correctly but received a mark only half as good.How many problems were there in the second test?

  1. Mia

    24/25 correct is a 96% score
    If she only did half as good then she got
    96/2=48% on the second test

    She also got twice as many problems correct.
    24*2=48

    In this problem the number of problem she got correct is also her percentage.

    48 divided by what number will give her a score of 48%

  2. Reiny

    questions in 2nd test --- x

    so 48/x = (1/2)(24/25)
    48/x = 24/50
    24x = 2400
    x = 100

    There were 100 problems

    check:
    1st test = 24/25 = 96%
    2nd test = 48/100 = 48% , which is 1/2 of 96%

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