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1 August, 13:53

One of Gemma's 5 friends is going to upgrade to a newer device soon. The average cost of their devices will then increase to $663 from the previous $657. How much more expensive than the older one is this newer device?

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  1. 1 August, 14:07
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    Old value of 5 devices = 657

    New value of 5 devices = 663

    Increment cost of 5 devices

    663 - 657

    6

    Therefore the increment for one device

    6 / 5

    1.2
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