Maths

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Rupashi needs to get a perfect score of 100 For her last English test in this year so as to improve her average score of 84 to 86 .how many test were there altogether in this year

  • Maths -

    If there are n tests already taken, we need

    84n + 100 = 86(n+1)
    84n + 100 = 86n + 86
    2n = 14
    n = 7

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