Question 17 - Upper Level: Mathematics Achievement Practice Test for the ISEE

The probabilities that Emily will pick a yellow, blue, black and red marbles are \(\frac{1}{2}\), \(\frac{1}{3}\), \(\frac{1}{6}\) and \(\frac{2}{15}\), respectively.
If there are 30 marbles in all, how many marbles are there for the color that has the least chance of being picked by Emily?

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