The mean of 6 numbers is 12. If one number is removed and the new mean becomes 11, what was the removed number? (Sum was 72, new sum 55, removed = 72-55 = 17)
Q1. The mean of 6 numbers is 12. If one number is removed and the new mean becomes 11, what was the removed number? (Sum was 72, new sum 55, removed = 72-55 = 17)
Answer: 17
Explanation: Original sum = 6 × 12 = 72; after removing one number, new sum = 5 × 11 = 55; so the removed number = 72 − 55 = 17.