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saurabh sharma

· started a discussion

· 1 Months ago

How ? (Question:248637.0)

Sum of two children is 4 and the difference is 2, then how can the elder one be of 3 years ? It should be 2 instead, if i am not wrong

Question:
The average age of a family of 5 persons, 5 years back was 25 years. Due to birth of two children, the average age of the family now is 22 years. If the age difference between the two children is 2 years. The age of elder child is —
Options:
A) 3
B) 5
C) 7
D) 9
Solution:

Ans: (a) 

5 years ago, sum of ages of 5 members = 5 × 25 = 125 years

Today their ages = 5 × 5 = 25 and 25 + 125 = 150 years

Sum of 7 members = 22 × 7 = 154 years

Sum of two children = 4 years

Difference of two children = 2 years

Age of elder child = 3 years

Knowledge Expert

· commented

· 1 Months ago

Dear Student
While solving the question You would reach an equation
elder child + younger child=4
given
elder child-Younger child=2
So, By calculation the age of Elder child=3years
Regards
Keep learning, Keep solving
Team TopRankers

sumit

· commented

· 1 Months ago

why 2 then sum be = 2 and age cann't be 0 so 1 for younger and 3 for elder
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