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use the rack of 15 billiard balls shown.
If one ball is selected at random, determine the odds in favor of it containing two digits.
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are the billiard balls numbered 1 - 15 ?
yes they are
so there are 9 balls marked with 1 digit and 6 marked with 2 digit numbers.
Probability to select a ball at random, and it having a 2 digits is (number of balls with 2 digits) / (total number of balls) = 6/15=2/5=0.4
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