Final answer:
At an uncontrolled intersection, the driver on the right must yield to the driver on the left.
Step-by-step explanation:
To determine which driver must yield the right of way at an uncontrolled intersection, you need to understand the basic right-of-way rules. At an uncontrolled intersection, the driver on the left must yield to the driver on the right. This means that if two vehicles arrive at the same time, the driver on the left must wait for the driver on the right to go first. If two vehicles arrive from different streets, the driver on the street without a stop sign or yield sign must yield to the driver on the street with the stop sign or yield sign.
For example, let's say there is an uncontrolled intersection where Driver A is approaching from the south and Driver B is approaching from the east. In this case, Driver B must yield to Driver A because Driver A is on the right. If Driver A and Driver B arrive at the same time, Driver B must still yield to Driver A since Driver A is on the right.
So, in general, the driver who is on the right at an uncontrolled intersection must yield the right of way to the driver on the left.