Question 401087
A box contains 9 balls numbered 1 to 9. A ball is taken at random from the box. Find the probability that the ball has an even number. 



number of successes
----------------------- = Probability
number of possibilities


The balls are: 1,2,3,4,5,6,7,8,9
Successes (evens) are: 2,4,6,8 {that's four total}
Probability of drawing an even is 4/9
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