323,000 is how you would write that
The answer is 25, hope this helps :)
The cardinality of a sample space means the size of the sample space.
Event A: There are only 2 possible outcomes. Cardinality is 2.
Event B: There are 5 possible outcomes. Cardinality is 6.
24 is the answer for(3)=8
15 is the answer for (3)=5
