Answer:
Average speed is defined as the amount of movement that a object does in a given lapse of time.
So if i say: the car moves with a speed of 10km/h
This means that the car travels around 10km in the lapse of an hour, and here you can see that the speed is a scalar.
Now, if i say; the car moves at 10km/h to south.
We also have a direction, so we have now a vector, where the module of this vector is equal to the speed of the car.
so a non-example of average speed is the velocity of something.