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3yr ago, the average age of family of 5 ...

3yr ago, the average age of family of 5 members was 17yr . Even after the birth of a child , the average is same today. Find out the age of child.

A

3 वर्ष

B

2 वर्ष

C

`1(1)/(2)` वर्ष

D

1 वर्ष

Text Solution

Verified by Experts

The correct Answer is:
B
वर्तमान में बच्चे सहित परिवार की आयु `= 17xx6 = 102` वर्ष 3 वर्ष पहले परिवार की आयु `= (5xx3) + (17xx5)`
= 100 वर्ष
`:.` बच्चे की आयु = 102-100 = 2 वर्ष
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