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EEJ MAIN Mathematics QUESTION #7492
Question 1
The mean of the data set comprising of 16 observations is 16. If one of the observations valued 16 is deleted and three new observations valued 3, 4 and 5 are added to the data, then the mean of the resultant data is:
  • 16.8
  • 16
  • 15.8
  • 14✔️
Correct Answer Explanation
Original sum = \(16 \times 16 = 256\). After deleting 16: sum = 240. After adding 3, 4, 5: sum = 252. New count = 18. Mean = \(\frac{252}{18} = 14\).