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We can say that let the amounts invested by Puneet and Malik be Rs. 4p and 5p respectively. According to question, (4p × 6 + (4p – 5000) × 6)/(5p × 6 + (5p – 5000) × 6) = 3/5 (8p – 5000)/(10p – 5000) = 3/5 40p – 25000 = 30p – 15000 10p = 10000 p = 1000 Desired amount = 9 × 1000 = Rs.9,000
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