Here are some examples of where we use integers in real life:-
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how theory of probability used in real life
belongs to an infinite number of sets. For example, the Real Numbers, the Rational Numbers, Integers, negative integers, odd negative integers, negative primes numbers, the set {12, -17, 98} or {2.76, pi, -17, k, wikianswers}. In fact any collection, however random, of numbers or other things, that includes -17.
The integers. Also: the rational numbers, the real numbers and (depending on your definition) the complex numbers.
NO where!
18 positive integers and 36 integers (negative and positive)