C. 50
Feedback The count of heads gives the total number of animals / birds as each animal / bird has one head.
Let the number of horses be x.
The remaining will be pigeons. The number of pigeons = (80 - x).
Each pigeon has 2 legs and each horse has 4 legs.
Therefore, total number of legs = 4x + 2(80 - x) = 260
=>4x + 160 - 2x = 260
=>2x = 100
=>x = 50.
x is the number of horses. The number of horses in the farm is 50.