Answer:
be “well-defined” the collection description would have to settle all such questions. ... All these questions indicate the statement is ambiguous, i.e., it is not clear which students are members of this collection, hence, the collection is not well-defined.
No, a collection of US museums is a set.
A set is a well-defined collection of objects.
The elements that make up a set can be any kind of mathematical objects: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other sets.
Collection of US museums is a well-defined collection.
So, collection of US museums is a set.
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