Question : The average of 15 numbers is 53. A number is removed and the average of 14 numbers now becomes 55. Which number was removed?
Option 1: 26
Option 2: 23
Option 3: 25
Option 4: 24
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Correct Answer: 25
Solution :
The sum of the original 15 numbers = 15 × 53 = 795
After removing one number, the sum of the remaining 14 numbers = 14 × 55 = 770
The number that was removed = 795 – 770 = 25
Hence, the correct answer is 25.
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