The average age of a husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is___________?
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Answer: C. 40 years
Explanation
The present combined age of all three family members is calculated by adjusting past age sums. Subtracting the current combined age of the wife and child from the total family age gives the answer. The husband's current age evaluates precisely to forty years based on the chronological data provided. Average age calculations require multiplying the given average by the number of individuals involved. Past age sums must be adjusted forward by adding the elapsed years for every living person. Subtracting subset age totals from the complete family total isolates the missing individual's age.
Demographic studies and insurance actuarial tables rely heavily on average age tracking over time. Family milestone planning requires accurate calculation of current and future individual ages. Chronological reasoning puzzles test fundamental arithmetic and logical deduction skills in mathematics. Option a underestimates the husband's present age by five years due to an adjustment error. Option b is incorrect because it significantly understates the current age derived from the totals. Option d is wrong because the correct answer of forty years is explicitly available elsewhere.
- Subject
- Mathematics
- Category
- Mathematics
- Topic
- —
- Difficulty
- medium
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