1.  Albert buys 4 horses and 9 cows for ₹ 13,400. If he sells the horses at 10% profit and the cows at 20% profit, then he earns a total profit of ₹ 1880. The cost of a horse is:
A. ₹ 1000
B. ₹ 2000
C. ₹ 2500
D. ₹ 3000

Answer: Option B

Explanation:

Let C.P. of each horse be ₹ x and C.P. of each cow be ₹ y.

Then, 4x + 9y = 13400 --------- (i)

And, 10% of 4x + 20% of 9y = 1880

⇒ 2/5 x + 9/5 y = 1880 => 2x + 9y = 9400 ----- (ii)

Solving (i) and (ii), we get : x = 2000 and y = 600.

∴ Cost price of each horse = ₹ 2000.