The price of 10 chairs is equal to that of 4 tables. The price of 15 chairs and 2 tables together is Rs. 4000. The total price of 12 chairs and 3 tables is:	Choose the correct choice from the following: A) Rs. 3500 B) Rs. 3750 C) Rs. 3840 D) Rs. 3900 E) None
EXPLANATION   Let the cost of a chair and that of a table be Rs. x and Rs. y respectively.   Then, 10x = 4y or y = 5b/2 x   15x + 2y = 4000   15x + 2 x 5/2 x= 4000   20x = 4000   x = 200.   So, y = 172 = 500.   Hence, the cost of 12 chairs and 3 tables = 12x + 3y   = Rs. (2400 + 1500)   = Rs. 3900.   Answer Rs. 3900
<result>D</result>
The price of 10 chairs is equal to that of 4 tables. The price of 15 chairs and 2 tables together is Rs. 4000. The total price of 12 chairs and 3 tables is: