**Below are some definitions we learn't in class today.**

SET: a collection of objects, may be things, people, numbers, etc.

SUBSET: a "smaller" collection of objects taken from a given set.

UNIVERSE: the set of all objects being considered.

NULL SET: a set that is empty, a set with no members, objects, etc.

**NB:**If two sets have no common elements, they are said to be

**"disjoint".**

**OPERATION ON SETS**

Below are some terms and examples

**Union**(

**U**)

A U B means gather all the objects in a set A with all the objects in set B.

Union (

**U**) means "

**or**".

**Exclusion**(

**/**)

A/B means everything that is in set A excluding those things that are also in set B.

Exclusion (

**/**) means "

**excluding**".

**Intersection**(

**n**)

A n B means to gather all the objects that are in both set A and B.

Intersection (

**n**

**) means "**

**and**".

Do your homework ... Practise makes Perfect!

Good luck to all!

The next scribe is Eric.

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