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Thread: mathematics tests

  1. #1
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    mathematics tests

    Just before her last mathematics test this year Rajee’s average mathematics
    mark was 89%. She scored 97% in the last test and her average is now 90%.
    The number of mathematics tests she wrote this year is__________


  2. #2
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    Smile Re: mathematics tests

    In that given sum is....

    89x + 97y = 90 (x+y)

    89x + 97y = 90x + 90y

    7y=x

    So any number satisfied this equation will be the result...

    Example (1,7) (2,14) (3,21) ......

    ----------------------------------
    suresh


  3. #3
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    Re: mathematics tests

    It is very clear that values of Y is 1.

    The number of mathematics tests she wrote this year is 8 (7+1).


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