Question : The average age of 14 friends is 14 years. If the age of $15^{\text {th }}$ friend is added, then the average remains the same. What is the age of the $15^{\text {th }}$ friend?
Option 1: 15 years
Option 2: 18 years
Option 3: 14 years
Option 4: 12 years
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Correct Answer: 14 years
Solution :
The average remains unaffected if a value equal to the average is added to the group.
Hence, the correct answer is 14 years.
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