Question

what of the following is a well-defined set?

Answer 1

Answer:

A set is well-defined if there is no ambiguity as to whether or not an object belongs to it, i.e., a set isdefined so that we can always tell what is and what is not a member of the set. Example: C = {red, blue, yellow, green, purple} is well-defined since it is clear what is in the set

Answer 2

Answer:

a set is a  well defined collection of objects. the objects of a set are called its elements. if a set has no element, it is called an empty set and it is denoted by

Explanation:

short answer: its letter A. a set of happy people