Ben rolls a standard number cube (sides labeled with numbers 1 through 6). Find the probability that Ben rolls a number greater than 2 or an even number.
math - MathMate, Sunday, March 27, 2011 at 11:44pm
Events(x>2)={3,4,5,6}
Events(even)={2,4,6}
So
B=Events(x>2)∪Events(even)
={3,4,5,6}∪{2,4,6}
={2,3,4,5,6}
|B|=cardinality of B = 5
Therefore the probability is 5/6
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