Question : The average age of six brothers is 15 years. If their father is also included, the average is increased by 7 years. Find the age of the father (in years).
Option 1: 44 years
Option 2: 77 years
Option 3: 64 years
Option 4: 60 years
Correct Answer: 64 years
Solution :
The average age of six brothers is 15 years.
Total age of six brothers = 15 × 6 = 90 years
Adding the age of their father, the new average becomes 15 + 7 = 22
Total age = 22 × 7 = 154 years
Father's age = 154 – 90 = 64 years
Hence, the correct answer is 64 years.
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