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Arithmetic Ability
Stocks and Shares

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Q.

A man sells Rs.5000, 12 % stock at 156 and uinvests the proceeds parity in 8 % stock at 90 and 9 % stock at 108. He hereby increases his income by Rs. 70. How much of the proceeds were invested in each stock?

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Correct choice: B

Explanation:

S.P of Rs. 5000 stock = Rs.(156/100*5000)= Rs. 7800. Income from this stock = Rs.(12/100*5000) = Rs. 600. Let investment in 8 % stock be x and that in 9 % stock = (7800 - x). Therefore, (x*8/90)+(7800−x)*9/108=[600+70] 4x/45+7800−x/12=670⇔x=3600 Therefore, Money invested in 8 % stock at 90 = Rs. 3600. Money invested in 9 % at 108 = Rs. (7800-3600) = Rs. 4200.
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