First lesson

• Sample space

  Is the set of all possible outcomes of a statistical experiment and is represented by the symbol S.
• Outcome

  Is the result of single trial of a probability experiment
• Event

  Consist of a set of outcomes of a probability experiment
• Null space or empty space

  Is a subset of the sample space that contains no element.
• Mutually exclusive

  Two events are usually exclusive if they have no common element
• Tree diagram

  Is a device of line segments emanating from a starting point and also from the outcome point