This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ds dealt, none
out of 36 tries.
at least one tail was thrown had all diamonds …
Subjective (Judgement) Probability – probability based on personal judgement
Range of Probabilities Rule 0 ! P(E) ! 1 EC Complement of an Event – the set of all outcomes in a sample space not in the event.
Notation: The complement of an event E is denoted E C or E'.
Note: P(E) + P( E C ) = 1 P(E) = 1 – P( E C ) E P( E C ) = 1 – P(E) Mutually Exclusive (Disjoint) Events – events that have no common outcomes
throwing a 5 on a die OR
throwing an even number flipping two coins and having
at least one head OR no heads drawing an 2 from a deck
OR drawing a face card Addition Rule – P(E or F) = P(E) + P(F) if E and F are mutually exclusive events.
P(throwing a 5 OR throwing an even number)
= P(throwing a 5) + P(throwing an even number)
1342
=+==
6663 P(throwing a 5 OR throwing an odd number)
= P(throwing a 5) + P(throwing an odd number) – P(throwing a five AND an odd number)
13131
=+!==
66662
P(drawing a face card OR drawing a diamond)
= P(drawing a face card) + P(drawing a diamond) – P(drawing a fa...
View
Full
Document
 Spring '14
 Probability

Click to edit the document details