Name the written test a potential driver must pass and list the minimum required score to earn a learner’s license.

Written Permit test or in some states the Knowledge test

Each state is different.  For example, I found in California it is:
There are 46 questions on the test. A passing score is at least 38 correct answers. )82.6%) You have three chances to pass the test. If you fail, you must wait 7 days before taking it again.

But in Oklahoma it is:
The present Oklahoma written drivers test is made of 50 questions. You must get at least 40 questions (80%) correct for a passing score. You must not try taking the written driver's test on the same day. You need to wait at least one day.

Wow the answer was a on e dgenuity, ignore the other autistic answers 

In 1973 was when graphical user interfaces (guis) pioneered.