i

• n(S)


  Number of elements in the sample space
• Event A


  Set of outcomes where the event A occurs
• n(A)


  Number of elements in event A
• P(A)


  Probability of event A
• Event B


  Set of outcomes where the event B occurs
• n(B)


  Number of elements in event B
• P(B)


  Probability of event B
• P(A and B)


  Probability of both event A and event B occurring
• P(A ∩ B)


  Probability of both event A and event B occurring
• Independent events


  Events where whatever happens in one event has absolutely nothing to do with what will happen next
• Characteristics of independent events

  1. The two events are unrelated

  2. You repeat an event with an item whose numbers will not change

  3. You repeat the same activity, but you REPLACE the item that was removed