A and B start a business jointly. A invests Rs. 16,000 for 8 months and B remains in the business for 4 months, Out of total profit, B claims - of the profit. How much money was contributed by B ?	Answers:
A) 12822
B) 12800
C) 12819
D) 12129
E) 12811
Let the total profit be Rs. x. Then, B = 2x/7 and A = (x - 2x /7) = 5x / 7.   So, A : B = 5x/7 : 2x/7 = 5 : 2.   Let B s capital be Rs. y. Then, (16000 * 8) / ( y * 4) = 5/2 &lt;=&gt; (16000 * 8 * 2) / (5 * 4) = 12800..   Answer: 12800
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A and B start a business jointly. A invests Rs. 16,000 for 8 months and B remains in the business for 4 months, Out of total profit, B claims - of the profit. How much money was contributed by B ?