Two years ago the average age of a family of 8 member was 18 years. After the addition of a boy the average age of the family remains the same today. What is the age of the baby? (a) 2 Years (b) 3 Years (c) 4 Years (d) 2.5 Years
Answers
2 Years
Step-by-step explanation:
Average age of 8 members two years ago = 18 years
Sum of age of 8 members two years ago = 144 years
After the addition of a baby the average age of the family is same today.
i.e, Average age of 9 members today = 18 years
Sum of age of 9 member today = 162 years
In these 2 years the age of 8 members is also increased
Increase in the age of 8 members = 8×2 = 16 years
Sum of ages of 8 members today = 144 + 16 = 160 years
Age of child = 162 - 160 = 2 years
Answer:
2
Step-by-step explanation:
Average age of 8 members two years ago = 18 years
Sum of age of 8 members two years ago = 144 years
After the addition of a baby the average age of the family is same today.
i.e, Average age of 9 members today = 18 years
Sum of age of 9 member today = 162 years
In these 2 years the age of 8 members is also increased
Increase in the age of 8 members = 8×2 = 16 years
Sum of ages of 8 members today = 144 + 16 = 160 years
Age of child = 162 - 160 = 2 years
Hope it helps!
Brainliest please! :)