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If xerox paper costs 5 cents a sheet and a buyer. . .

This topic has 1 expert reply and 0 member replies

If xerox paper costs 5 cents a sheet and a buyer. . .

Post Fri Sep 22, 2017 10:19 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    If xerox paper costs 5 cents a sheet and a buyer gets 10% discount on all xerox paper one buys after the first 2000 papers and 20% discount after first 10000 papers, how much will it cost to buy 25000 sheets of xerox paper?

    A. $1250
    B. $1060
    C. $1350
    D. $900
    E. $1000

    The OA is B.

    I got confused here. I need some help. Experts can you tell me how to solve it?

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    Post Sat Sep 23, 2017 10:01 am
    Hi Vincen,

    To start, the GMAT almost always lists the answer choices 'in order' (often from least to greatest although sometimes in decreasing order). You can sometimes take strategic advantage of that information, so it's important to make sure that you're using practice questions that follow that design pattern. That all having been said, to answer this question, we need to break the calculation down in to 'pieces' (based on the cost/discount of each piece):

    The cost of the first 2,000 sheets
    The cost of the next 8,000 sheets
    The cost of the final 15,000 sheets

    At $0.05 per sheet, the first 2,000 sheets would cost (2,000)($0.05) = $100

    Since a 10% discount is applied to the TOTAL cost of the next 8,000 sheets, that cost would be....
    (8,000)($0.05) = $400 - (.1)($400) = $360

    A 20% discount is applied to the TOTAL cost of the final 15,000 sheets....
    (15,000)($0.05) = $750 - (.2)($750) = $600

    Total Cost = $100 + $360 + $600 = $1060

    Final Answer: B

    GMAT assassins aren't born, they're made,
    Rich

    _________________
    Contact Rich at Rich.C@empowergmat.com

    Thanked by: Vincen

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