Question

Check the given collection is set? If not a set, give reason

Counting number between $30$ and $40$

Answer 1

A set is a well-defined collection of object. Well defined means the object must belong to a particular group.

Counting number between $30$ and $40$ is a well defined collection of object as it is clearly understood and we can name all the numbers in between $30$ and $40$ which is $\left\{31,32,33,34,35,36,37,38,39\right\}$

Hence, The given collection is a set.