Seven years ago the average age of a family of 2 members was 21 years.
Seven years ago the average age of a family of 2 members was 21 years. A child has been born. due to Which the average age of the family is 23 years today. What is the present age of the child?
Answer/Solution
13years
Steps/Work
Explanation:
Average of the family of two numbers
7 years ago = 21
= (21+ 7) * 2 = 56 years
Average age of the family of three members at present = 23 years
= 23 * 3 = 69 YEARS
Age of child = 69 - 56 = 13 years
Answer: Option B
Average of the family of two numbers
7 years ago = 21
= (21+ 7) * 2 = 56 years
Average age of the family of three members at present = 23 years
= 23 * 3 = 69 YEARS
Age of child = 69 - 56 = 13 years
Answer: Option B