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Which of these sets of marks has the greatest range?

Competition practiceStatistics
  • A20, 28, 51
  • B8, 15, 33
  • C40, 44, 70
  • D12, 30, 45

Step-by-Step Solution

Ranges: 45 − 12 = 33, 51 − 20 = 31, 33 − 8 = 25, 70 − 40 = 30. The greatest is 33, for 12, 30, 45. (The set with the largest number, 70, does not have the largest spread.)
Answer: D) 12, 30, 45

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