Friday, April 10, 2009

Probability of Mutually Exclusive Events

Probability of Mutually Exlussive Events



1. Two events are said to be mutually exclusive if they cannot occur at the same time( If one
event occur, then the other event cannot)


2. If two events A and B are mutually exclussive, then






3. Eg :

a. Munira travels by bus and by car to school
b. To obtain head and tail when a coin is tossed
c. A ball drawn from a bag are red and blue

4. Two events, A and B, are said to be EXHAUSTIVE if their union is the sample space.


5. Eg :


The spinner is spun. Given that
A = event of getting an odd number
B = event of getting a number that is less than 2
C = event of getting an even number

Determine whether each of the following pairs of events are mutually exclusive or
exhuastive

a) A and B b) B and C c) A and C












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