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Study the sales table (phones sold, in units). Store A — Brand X 450, Brand Y 300; Store B — X 600, Y 400; Store C — X 500, Y 350; Store D — X 550, Y 250; Store E — X 400, Y 500. By how many units do the total phones sold by store C exceed the total phones sold by store D?

Competition practiceData Interpretation
  • A30
  • B40
  • C50
  • D60

Step-by-Step Solution

Store C total = 500 + 350 = 850; store D total = 550 + 250 = 800. Difference = 850 − 800 = 50.
Answer: C) 50

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