# Chapter 12 - Data Analysis and Probability - Chapter Test - Page 779: 18

$1/35$

#### Work Step by Step

3 blue, 5 yellow, 7 red P(first marble is blue) = $3/(3+5+7) = 3/15$ P(second marble is blue) = $2/(3+5+7-1) = 2/14$ $3/15*2/14 = 1/5*1/7 = 1/35$

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