By investing in 1623% stock at 64, one earns Rs. 1600. The investment made is Pick:
A) s. 9600
B) s. 7500
C) s. 5640
D) s. 6144
E) s. 6760
Explanation :   Market Value = Rs.64   Face Value is not given and hence take it as Rs.100   16 2/3% of the face value = 50/3   ie, to earn 50/3, investment = Rs.64   Hence, to earn Rs.1600, investment needed = 64×3×1600/50=6144   Answer : Option s. 6144
<result>D</result>
By investing in 1623% stock at 64, one earns Rs. 1600. The investment made is