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Question

by selling at rs.92, some 2.5% rs.100 shares and investing the proceeds in 5%rs.100 shares at rs.115, a person increased his annual income by rs.90. find the number of share sold and purchased.

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Solution

Let the number of shares sold = x.Face value of 1 share = Rs 100Rate of dividend = 2.5%income on 1 share = 2.5% of 100 = Rs 2.50Now, annual income = x × 2.50= Rs 2.50xSP of 1 share = Rs 92SP of x shares = Rs 92xNow, Face value of 1 new share = Rs 100market value of 1 new share = Rs 115Number of new shares purchased = 92x115Rate of dividend = 5%annual income on new shares = 92x115 ×5100×100 = Rs 92x23Now, according to condition 92x23 - 2.50x = 9092x - 57.50x23 = 9034.5x = 90×23x = 60Number of shares sold = 60Number of new shares purchased = 92115×60 = 48

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