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Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 year old girl, and they had a baby boy last year. What is the average of the family 2 years from now assuming no one joins or leaves from the family in the next 2 years.
  • a)
    40
  • b)
    42.5
  • c)
    36.5
  • d)
    35.8
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Four years ago, the average of a 4 member family was 40 years. 3 year...
Given:
- Four years ago, the average age of a 4-member family was 40 years.
- 3 years ago, a boy got married to a 23-year-old girl.
- They had a baby boy last year.
- No one joins or leaves the family in the next 2 years.

To Find:
The average age of the family 2 years from now.

Solution:
Let's break down the information given step by step:

Step 1: Average age of the family 4 years ago
- Four years ago, the average age of the family was 40 years.
- This means the sum of ages of all family members four years ago was 40 * 4 = 160 years.

Step 2: Family composition 3 years ago
- 3 years ago, a boy got married to a 23-year-old girl.
- This means the boy was not part of the family four years ago, and the girl's age was 23.
- So, the sum of ages of the remaining family members (parents) three years ago was 160 - 23 = 137 years.

Step 3: Family composition 2 years ago
- 2 years ago, the couple had a baby boy.
- This means the boy is now a part of the family, and his age is 2 years.
- So, the sum of ages of the family members (parents and the baby boy) two years ago was 137 + 2 = 139 years.

Step 4: Average age of the family 2 years from now
- Assuming no one joins or leaves the family in the next 2 years, the age of each family member would increase by 2 years.
- So, the sum of ages of the family members 2 years from now would be 139 + 2 * 3 = 145 years.
- Since the family still consists of 4 members, the average age would be 145 / 4 = 36.25 years.

Conclusion:
The average age of the family 2 years from now is 36.25 years, which is approximately 35.8 years (rounded to one decimal place). Therefore, option 'D' is the correct answer.
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Community Answer
Four years ago, the average of a 4 member family was 40 years. 3 year...
Four years ago, sum of all the family members’ age = 4 X 40 = 160
Three years ago, sum of all the family members’ age = 164 + 23 = 187
Last year, sum = 197 [ 187 + 5 + 5]
Two years from now, sum = 197 + 18 = 215
Hence, average = 215/6 = 35
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Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 year old girl, and they had a baby boy last year. What is the average of the family 2 years from now assuming no one joins or leaves from the family in the next 2 years.a)40b)42.5c)36.5d)35.8Correct answer is option 'D'. Can you explain this answer?
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Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 year old girl, and they had a baby boy last year. What is the average of the family 2 years from now assuming no one joins or leaves from the family in the next 2 years.a)40b)42.5c)36.5d)35.8Correct answer is option 'D'. Can you explain this answer? for CAT 2025 is part of CAT preparation. The Question and answers have been prepared according to the CAT exam syllabus. Information about Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 year old girl, and they had a baby boy last year. What is the average of the family 2 years from now assuming no one joins or leaves from the family in the next 2 years.a)40b)42.5c)36.5d)35.8Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for CAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Four years ago, the average of a 4 member family was 40 years. 3 years ago, a boy got married to a 23 year old girl, and they had a baby boy last year. What is the average of the family 2 years from now assuming no one joins or leaves from the family in the next 2 years.a)40b)42.5c)36.5d)35.8Correct answer is option 'D'. Can you explain this answer?.
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