If his income from both is equal, amount invested on first stock was

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RRB TC CC Exam (Patna) 2006 click here to view all questions

Ravi invested Rs. 913 partly in 4% stock at Rs. 97 and partly in 5% stock at Rs.107. If his income from both is equal, amount invested on first stock was.

ARs. 750

BRs. 525

CRs. 610

DRs. 485

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Correct Answer is : 485 Let he invests x in 4% stock and y in 5% stock  On 97 he earns Rs.4. On x he earns $4x \over 97$ Similarly on y he will earns $5y \over 107$ $4x \over 97$ = $5y \over 107$ x = $485y \over 428$ x + y = 913  Substituting the value of x we get y = 428  First installment = 485 Akilesh Kharvi ? answered Nov 4 '2016 at 20:54 All Comments

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