SSC CGL Average question with solution
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The average of 10 numbers is 27. If one number is removed, the average of the remaining numbers becomes 24. What is the removed number?
- (A)27
- (B)54
- (C)30
- (D)44
Correct answer: (B) 54
Sum of all 10 numbers = 10 × 27 = 270. Sum of the remaining 9 numbers = 9 × 24 = 216. The removed number is the difference: 270 − 216 = 54.
Shortcut: Removed number = old average + (n − 1) × (old average − new average) = 27 + 9 × (3).
About this question
- Subject
- Quantitative Aptitude
- Topic
- Average
- Exam
- SSC CGL
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Last reviewed on 5 Oct 2026. Spotted a mistake? See our correction policy.