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. 1310, how much does he invest in 12% stock at Rs. 120?	Choose the correct option
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) = 1310   x/10 + 3/25(12000-x) = 1310   5x + 72000 - 6x = 1310 x 50   x = 6500.   Answer = s. 6500
<result>E</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. 1310, how much does he invest in 12% stock at Rs. 120?