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probability

by sud21 » Sat Jan 28, 2012 10:20 pm
Eight red balls numbered from 1 to 8 and eight blue balls numbered from 1 to 8 are put into basket A and B, respectively. If a blue ball and a red ball are selected at random, what is the probability that two balls have the same number?
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by rijul007 » Sat Jan 28, 2012 11:07 pm
sud21 wrote:Eight red balls numbered from 1 to 8 and eight blue balls numbered from 1 to 8 are put into basket A and B, respectively. If a blue ball and a red ball are selected at random, what is the probability that two balls have the same number?
Total number of possible selections = 8*8 = 64
Number of possible selections such that each ball has the same number = 8 {(1,1),(2,2),(3,3)..(8,8)}
Probability = 8/64 = [spoiler]1/8[/spoiler]
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