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Identifying Mutually Exclusive Events
Contributed by: Miles
(Original author: Barber)
In probability theory, two events are said to be mutually exclusive if they cannot occur at the same time or simultaneously. 
If two events are considered mutually exclusivethen the probability of both events occurring at the same time will be zero.
Event A:   Turn Left

Event B:    Turn Right
 Mutually Exclusive
Non-mutually exclusive
Event A: Coin lands on heads.

Event B: Coin lands on tails.
Non-mutually exclusive
Mutually exclusive
Event A:  Roll a 6 on a number cube

Event B: Roll an even number on a number cube


Mutually Exclusive
Non-mutually Exclusive
Event A:   Draw a king from a deck a cards

Event B:   Draw a 'heart' from a deck of cards
Mutually Exclusive 
Non Mutually Exclusive
Event A: Roll a 1 on a number cube

Event B: Roll an even number on a number cube
Non mutually exclusive
Mutually exclusive
Event A:  A student is in the 9th grade.
Event B: A student (same student) is in the 10th grade.

Mutually exclusive
Non mutually exclusive
Event A:  Draw a black card from a deck

Event B: Draw a red card from a deck
Mutually exclusive
Non-mutually exclusive
Event A:  win first place

Event B:   win second place
Non mutually exclusive
Mutually exclusive
Event A:  take Geometry in Semester 1
Event B:   take Spanish in Semester 1
Non mutually exclusive
Mutually exclusive
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