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A man has Rs. 10,000 to invest. He invests Rs. 4000 at 5% and Rs. 3500 at 4%. In order to have a yearly income of Rs. 500, he must invest the remaining Rs. 2500 at what rate of interest?

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A man has Rs. 10,000 to invest. He invests Rs. 4000 at 5% and Rs. 3500 at 4%. In order to have a yearly income of Rs. 500, he must invest the remaining Rs. 2500 at what rate of interest? Answer: 6.4%

The remaining Rs. 2500 must be invested at a 6.4% interest rate to achieve a yearly income of Rs. 500. This is because the man would have already earned Rs. 340 from his first two investments, leaving him with Rs. 160 to earn from the remaining amount. Dividing the required income of Rs. 160 by the principal amount of Rs. 2500 gives an interest rate of 6.4%.

Question context

This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.