SSE JE Electrical Engineering 24 March 2021 Shift 2 Paper

Question : 25 of 200

Marks: +1, -0

There are 14 people in a joint family and the average age of all the family members is 30 years. Now, a baby boy is born in that family. After 4 years, what will be the average age of all the family members?

35 years
33 years
32 years
30 years

Validate

Solution:

Let, the sum of age of 14 people = x years
Average of 14 people

= x/14

According to question

x/14

= 30 years
x = 420 years
After 4 years;
Baby age = 4 years
So, the sum of age of 15 people after 4 years = 420 + (15 × 4) = 420 + 60 = 480 years
Now,
The average of 15 people including baby

= 480/15

= 32 years
Hence, The average age of family members after 4 years is "32 years".

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