Basic set notation

The first instance of  is under the Probability and statistics Math Mission. This exercise introduces basic set notation and operations.

Types of Problems
There is one type of problem in this exercise:


 * 1) Find the set: This problem describes two sets in standard set-listing notation. The student is asked to perform an operation on the sets, either union, intersection or set-difference. They write the correct elements in the provided box separated by commas, or select empty set if appropriate.Settheory1.png

Strategies
This exercise is easy to get accuracy and speed badges because there is only one type of problem and they can be performed fairly mechanically.


 * 1) Union, $$ \cup$$, means all elements in one set or the other.
 * 2) Intersection, $$ \cap$$, means all elements in one set and the other (simultaneously).
 * 3) The union operation will never have an answer of empty set because the initials sets are always non-empty.
 * 4) The order of elements in a set does not matter.
 * 5) On set-difference and union it is a good idea to just start concentrating on the first set and then throw additional ones as needed for union, or neglect the ones that taken out via set-difference.