SSC CGL Average question with solution
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The average of 10 numbers is 30. If one number is removed, the average of the remaining numbers becomes 32. What is the removed number?
- (A)12
- (B)32
- (C)2
- (D)30
Correct answer: (A) 12
Sum of all 10 numbers = 10 × 30 = 300. Sum of the remaining 9 numbers = 9 × 32 = 288. The removed number is the difference: 300 − 288 = 12.
Shortcut: Removed number = old average + (n − 1) × (old average − new average) = 30 + 9 × (-2).
About this question
- Subject
- Quantitative Aptitude
- Topic
- Average
- Exam
- SSC CGL
- Attempts on SSC Rank
- 1 (0% answered correctly)
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Last reviewed on 5 Oct 2026. Spotted a mistake? See our correction policy.