Transcript 2nd Nine Weeks Exam Review – Day 3

2nd Nine Weeks Exam
Review – Unit 6
Probability
Key Points
Mutually Exclusive…..
• Events that are mutually exclusive
cannot happen at the same time.
• For example, being a boy and a girl
are mutually exclusive events.
Complement….
• The complement of a probability is
what the probability is NOT.
• For example: If the probability of
wearing red today is 0.35, then the
probability of NOT wearing red is 1 –
0.35 = 0.65
“And” verses “Or”
• “And” probabilities you multiply
(You must be aware if the events are
independent or not independent)
• “Or” probabilities you add AND
subtract any intersections.
Theoretical vs.
Experimental Probability
•
Theoretical: assumes all outcomes in
the sample space are equally likely
to occur.
•
Experimental: outcomes taken from
an experiment.
“Given”……
P( A and B)
P( A given B) 
P( B)