Sammy got an average of 85% in four tests threethree of the scores were 79 97 85 find the fourth mark if he wrote a fifth test his average increase by 3 what is his fifth mark

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asked by joellej
  1. For the 4th test,
    79+97+85+x = 4*85
    so, x = 79

    Then, for the 5th test,
    4*85 + y = 5*(85+3)
    so, y=100

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    posted by Steve

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