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The data 2, 4, 4, 5, 7, 7, 7, 9, has a mean of 6 and its mode is 7. What is ?

Competition practiceStatistics
  • A8
  • B9
  • C7
  • D6

Step-by-Step Solution

Nine values with mean 6 add to 54; the given eight add to 45, so . Then 7 (three times) is still the mode.
Answer: B) 9

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