Explain the difference between a well defined set and a set that is not well defined. Give examples.

Step-by-step explanation:

A well defined set is one which is universally defined and accepted, you can easily define what the set is and what is not a member of the set. example is a set of integers between 1 and 30

A not well defined set is one which is ill defined set. example is a list of hit musical hit of 2019