SSC CGL Average question with solution
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The average of 5 numbers is 55. If one number is removed, the average of the remaining numbers becomes 53. What is the removed number?
- (A)53
- (B)63
- (C)68
- (D)55
Correct answer: (B) 63
Sum of all 5 numbers = 5 × 55 = 275. Sum of the remaining 4 numbers = 4 × 53 = 212. The removed number is the difference: 275 − 212 = 63.
Shortcut: Removed number = old average + (n − 1) × (old average − new average) = 55 + 4 × (2).
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.