Answer:
3:1
Step-by-step explanation:
The gear ratio of a gear set can be calculated by dividing the number of teeth on the driven gear by the number of teeth on the drive gear.
In this case, the driven gear has 36 teeth and the drive gear has 12 teeth, so the gear ratio is:
Gear ratio = 36/12 = 3
Therefore, the gear ratio of this gear set is 3:1. This means that for every one rotation of the drive gear, the driven gear will rotate three times.