A, B and C enter into partnership. A invests some money at the beginning, B invests double the amount after 6 months, and C invests thrice the amount after 8 months. If the annual gain be Rs.15000. A's share is?
Choose the correct choice from the following answers:
A) s.7500	B) s.7200	C) s.6000	D) s.5000	E) s.6750
x* 12 : 2x* 6: 3x* 4   1:1:1   1/3 * 15000= 
<gadget id="calculator">1/3 * 15000</gadget>
<output>5_000</output>
5000   ANSWER:s.5000
<result>D</result>
A, B and C enter into partnership. A invests some money at the beginning, B invests double the amount after 6 months, and C invests thrice the amount after 8 months. If the annual gain be Rs.15000. A's share is?