medium · LSAT Logical Reasoning

Corporate executives at a major retailer found that stores with background music had higher sales than stores without it. They concluded that playing background music in all their stores would increase total company profits.

Which of the following is an assumption required by the argument?

  1. Stores currently without background music have sales well below the industry average.
  2. Most customers prefer classical music to popular music while shopping for retail goods.
  3. Background music is the single most important determinant of a retail store's success.
  4. The cost of installing and maintaining the music systems will not exceed the additional revenue the music generates.
  5. Adding background music will raise sales in the music-free stores by at least as much as it did in the stores already using it.

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