To find the number of black horses in the herd, we can subtract the number of white horses from the total number of horses.
Given:
- Total horses = 78
- White horses = 43
Number of black horses = Total horses - White horses Number of black horses = 78 - 43 = 35
Now, we can find the ratio of black horses to white horses:
Ratio of black horses to white horses = Number of black horses : Number of white horses Ratio = 35 : 43
Thus, the ratio of black horses to white horses is 35:43.