Question

The average age of four brothers is 12 years. If the age of their mother is also included, the average is increased by 5 years. The age of the mother (in years) is :

• A. 43 years
• B. 37 years
• C. 53 years
• D. 48 years

Answer 1

Answer:

B. 37 years

Average age of 4 brothers = 12 yrs. Total age of 4 brothers = 4 × 12 = 48 yrs. Average age of 4 brothers + mother ( 5 persons) = 12 + 5 = 17 yrs. Total age of 4 brothers + mother = 5 × 17 = 85 yrs. The age of the mother = 85 – 48 = 37 yrs.