Statisticsmedium · Past Paper
The mean of 5 numbers is 18. If one number is excluded, their mean becomes 16. The excluded number is:
A24
B26
C28
D22
✓ Correct Answer: B — 26
Total sum of 5 numbers = 5 * 18 = 90. Total sum of 4 numbers = 4 * 16 = 64. Excluded number = 90 - 64 = 26.
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