Statisticsmedium · Past Paper
The mean of five numbers is 27. If one number is excluded, the mean becomes 25. The excluded number is:
A35
B27
C45
D30
✓ Correct Answer: A — 35
Sum of 5 numbers = 27*5 = 135. Sum of 4 numbers = 25*4 = 100. Excluded number = 135 - 100 = 35.
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