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Chris has 4 gray, 6 white and 5 yellow marbles in a bag. Chris draws one marble randomly, writes down the color and puts it back. Chris repeats the process two more times. What is the probability that Chris selected a yellow marble each time?
$\dfrac{1}{15}$
$\dfrac{1}{27}$
$0$
$\dfrac{2}{15}$
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