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The average age of a husband and his wife was 25 years when they were married 7 years ago. Now the average age of husband, wife and his son is 23 years. Find the age of son now.
- a)3yr
- b)4yr
- c)5yr
- d)6yr
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The average age of a husband and his wife was 25 years when they were ...
Answer – 3.5yr Explanation : (h+w – 14)/2 = 25 H+w = 64 Now, (h+w+s)/3 = 23 S = 69-64 = 5 years
Most Upvoted Answer
The average age of a husband and his wife was 25 years when they were ...
Given:
- The average age of husband and wife 7 years ago was 25 years.
- The average age of husband, wife and his son now is 23 years.
To find:
- Age of son now.
Solution:
Let the present age of husband, wife and son be H, W and S respectively.
1. The average age of husband and wife 7 years ago was 25 years.
- 7 years ago, the husband's age would be H - 7 and the wife's age would be W - 7.
- So, (H - 7 + W - 7)/2 = 25
- H + W = 59
2. The average age of husband, wife and son now is 23 years.
- (H + W + S)/3 = 23
- H + W + S = 69
Using the above two equations, we can find the age of son:
- H + W = 59 (from equation 1)
- H + W + S = 69 (from equation 2)
- Subtracting equation 1 from equation 2, we get:
- S = 69 - 59 = 10
Therefore, the age of son now is 10 years.
Answer: Option (c) 5yr.
- The average age of husband and wife 7 years ago was 25 years.
- The average age of husband, wife and his son now is 23 years.
To find:
- Age of son now.
Solution:
Let the present age of husband, wife and son be H, W and S respectively.
1. The average age of husband and wife 7 years ago was 25 years.
- 7 years ago, the husband's age would be H - 7 and the wife's age would be W - 7.
- So, (H - 7 + W - 7)/2 = 25
- H + W = 59
2. The average age of husband, wife and son now is 23 years.
- (H + W + S)/3 = 23
- H + W + S = 69
Using the above two equations, we can find the age of son:
- H + W = 59 (from equation 1)
- H + W + S = 69 (from equation 2)
- Subtracting equation 1 from equation 2, we get:
- S = 69 - 59 = 10
Therefore, the age of son now is 10 years.
Answer: Option (c) 5yr.
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Community Answer
The average age of a husband and his wife was 25 years when they were ...
Sum of the ages of husband and wife 7 years ago: 2×25=50
Sum of the ages at present= 23×3=69
Now, the difference is 69-50= 19
the total growth of husband and wife's is= 14(7yrs×2)
child's age will be 19-14= 5 Years
Sum of the ages at present= 23×3=69
Now, the difference is 69-50= 19
the total growth of husband and wife's is= 14(7yrs×2)
child's age will be 19-14= 5 Years
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