The mean of 10 numbers is 9, then sum of these numbers will be__________________?
Correct answer: D. 90
- A. 9
- B. 0.9
- C. 70
- D. 90
Explanation
Since mean = sum/n, the sum equals mean × number of observations = 9 × 10 = 90. The value 9 is the mean itself, not the total.
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