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IKMC 2015 - Grades 9-10 - Self-study Question 27

IKMC · IKMC 2015 - Grades 9-10 - Self-study

Question 27

Remove one number from 1,2,…, n. The mean of those left is 4.75. Which was removed?
  1. 5
  2. 7
  3. 8
  4. 9
  5. impossible to determine