ANS:D - Rs. 3900
Let the cost of a chair and that of a table be Rs. x and Rs. y respectively.
Then, 10x = 4y or y = |
5 |
x. |
2 |
15
x + 2
y = 4000
15x + 2 x |
5 |
x = 4000 |
2 |
20
x = 4000
x = 200.
So, y = |
|
5 |
x 200 |
|
= 500. |
2 |
Hence, the cost of 12 chairs and 3 tables = 12
x + 3
y
= Rs. (2400 + 1500)
= Rs. 3900.