The average of 7 numbers is 18. If one number is replaced by 30, the average increases to 20. The number that was replaced is:
CA Foundation · Quantitative Aptitude · MTP · September 2026
The average of 7 numbers is 18. If one number is replaced by 30, the average increases to 20. The number that was replaced is:
Suggested Answer and Working Notes:
Correct Answer: Option (B)
B. 16
Topics: Part-C: Statistics
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