4000 was divided into two parts such a way that when first part was invested at 3% and the second at 5%, the whole annual interest from both the investments is Rs.144, how much was put at 3%?
Pick
A) Rs.2500  B) Rs.2700  C) Rs.2800  D) Rs.5000  E) Rs.6000
Explanation:   (x*3*1)/100 + [(4000 - x)*5*1]/100 = 144   3x/100 + 200 â€“ 5x/100 = 144   2x/100 = 56 Ã¨ x = 2800   ANSWER IS Rs.2800
<result>C</result>
4000 was divided into two parts such a way that when first part was invested at 3% and the second at 5%, the whole annual interest from both the investments is Rs.144, how much was put at 3%?