The complement of a set in math is defined as a set of elements in the universal set that is not part of the original set. Explore the definition of the subset and complement of the subset of a universal set, how to determine the complement of a subset and the correct notation for writing a subset and its complement.

What is a complement of a number?

The number derived by subtracting a number from a base number. For example, the tens complement of 8 is 2. ... The binary complement of a number is created by reversing all bits and adding 1.

What does complementary event mean in math?

Two events are said to be complementary when one event occurs if and only if the other does not. The probabilities of two complimentary events add up to 1. For example, rolling a 5 or greater and rolling a 4 or less on a die are complementary events, because a roll is 5 or greater if and only if it is not 4 or less.