Let A be the set {1, 2, 3, 4}
Let B be the set {1, 3}
Let C be the set {1, 2, 4, 5}
From this, we can say that B is a subset of A because all of the members of B are also members of A. In other words... B can be made up by selecting some of the pieces of A (in this case, 1 and 3). Note that C is not a subset of A because you cannot create C by selecting some parts of A. This is because C includes the number 5 and A doesn't.
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give example of subset
If you have a set S, the only improper subset of S is S itself. An improper subset contains all elements of S and no others. It is therefore equivalent to S. For example if S ={1,2,3} then the improper subset is {1,2,3}, and an example proper subset is {1,2}.
no
Assume that set A is a subset of set B. If sets A and B are equal (they contain the same elements), then A is NOT a proper subset of B, otherwise, it is.
A subset is a smaller set that is part of a larger set. For example, the set of animals contains the subset of reptiles, the subset of mammals, and various others. Or in mathematics, the set of real numbers contains the subset of positive integers, the subset of negative integers, the subset of rational numbers, etc.