Albert buys 4 horses and 9 cows for Rs. 13400. If he sells the horses at 10% profit and the cows at 20% profit, then he earns a total profit of Rs. 1880. The cost of a horse is -

Answer: Option B

Let C.P. of each horse be Rs. x and C.P. of each cow be Rs. y.
Then,
= 4x + 9y = 13400 ......(i)
and,
10% of 4x + 20% of 9y = 1880
$$\begin{array}{rl}& \Rightarrow \frac{2}{5}x+\frac{9}{5}y=1880\\ & \Rightarrow 2x+9y=\mathrm{9400....}(\text{ii})\end{array}$$
Solving (i) and (ii), we get:
x = 2000 and y = 600
∴ Cost price of each horse = Rs. 2000