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:
Answer: Option D
Let the cost of a chair and that of a table be Rs. x and Rs. y respectively.
15x + 2y = 4000
20x = 4000
x = 200.
Hence, the cost of 12 chairs and 3 tables = 12x + 3y
= Rs. (2400 + 1500)
= Rs. 3900.