SOLUTION: A barn has stalls for 1000 animals. Forty percent of the stalls are for ponies and the rest for horses. On Tuesday, there were 200 ponies and a bunch of horses at the barn. The bar

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Question 207037: A barn has stalls for 1000 animals. Forty percent of the stalls are for ponies and the rest for horses. On Tuesday, there were 200 ponies and a bunch of horses at the barn. The barn was 75 percent full. How many horses were in the stalls?
(A) 400 (B) 450 (C) 500 (D) 550 (E) 600
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
D) 550
let y = horses
200+y=1000(.75)
200+y=750
Subtract 200 from both sides
200-200+y=750-200
y=550