Sakshi invests a part of Rs. 12,000 in 12% stock at Rs. 120 and the remainder in 15% stock at Rs. 125. If his total dividend per annum is Rs. 1350, how much does he invest in 12% stock at Rs. 120?
Choose one
A) s. 4000  B) s. 4500  C) s. 5500  D) s. 6000  E) s. 6500
Let investment in 12% stock be Rs. x.   Then, investment in 15% stock = Rs. (12000 - x).   12/120 * x + 15/125 * (12000- x) = 1350   x/10 + 3/25(12000-x) = 1350   5x + 72000 - 6x = 1350 x 50   x = 4500.   Answer = s. 4500
<result>B</result>
Sakshi invests a part of Rs. 12,000 in 12% stock at Rs. 120 and the remainder in 15% stock at Rs. 125. If his total dividend per annum is Rs. 1350, how much does he invest in 12% stock at Rs. 120?