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28 May, 19:00

Jack's average in math for the first nine weeks is an 88. His second nine weeks average decreased by 12.5%. What was his average for the second nine weeks?

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  1. 28 May, 19:48
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    The Answer to this question is the whole 18 weeks would be 81.5'/,
  2. 28 May, 20:06
    0
    If he had 88% first 9 weeks

    and he did 12.5% worse next 9 weeks

    88-12.5 = 75.5

    his average for the whole 18 weeks would be 81.5%
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