Question

Which of the following is not a set?
A. Set of kinds of matters B. Set of favorite subjects C. Set of even numbers D. Set of counting numbers less than 15

Answer 1

set of kind of matters

Step-by-step explanation:

set does not have matters

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Answer 2

Given,

Which of the following is not a set?

A. Set of kinds of matters

B. Set of favorite subjects

C. Set of even numbers

D. Set of counting numbers less than $\[15\]$

To find,

The correct option.

Solution,

Know that in mathematics, a set is a collection of elements and these elements can be numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other sets but the elements shall have some kind of interrelationship with each other and should be well defined and universal.

Understand in the given options matter, even numbers and numbers less than $\[15\]$ are well defined and universal but the favorite subject is not defined and can never be universal.

Hence, the correct option is (B) i.e. set of favorite subjects.