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?

A. 3600(8%), 4200(9%)
B. 4000(8%), 4200(9%)
C. 3600(8%), 4000(9%)
D. 4000(8%), 4000(9%)

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 * % stock be x and that in 9 % stock = (7800-x).

[x*(8/90)] + (7800-x) * (9/108) = (600+7)

4x/45) + [(7800-x)/12] = 670 ïƒ³ 16x + 117000-15x = (670*180)

x = 3600
Money invested in 8 % stock at 90 = Rs. 3600.

Money invested in 9 % at 108 = Rs. (7800-3600) = Rs. 4200.

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