If A represents the set of natural numbers less than 5, then find the number of elements in A.
Also, write the number of subsets.

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Solution

In mathematics, the natural numbers are those numbers used for counting and ordering. example : 1, 2, 3, 4, 5, 6, … ∞.
Less then 5 natural numbers are 1,2,3,4
therefore set $A = \{1, 2, 3, 4\}$
Subsets: If each element of set A is an element of set B, then set A is said to be the subset of set B.
The symbol for the subset is ⊆ .
It is written as A⊆B that is A is a subset of B while set B is called the superset of A.
here the number of subsets is A is $2^{4} = 16$

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1

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