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The range of a data set is 15. Every observation is multiplied by 3 and then 7 is added to it. What is the new range?

Competition practiceStatistics
  • A52
  • B22
  • C45
  • D15

Step-by-Step Solution

Adding a constant does not change the range; multiplying by 3 triples it: .
Answer: C) 45

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