ACT 2019 April(Z15) Math Question 5 Explanation - ACT Helper

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2019 April(Z15) Math Question 5
Probability
- One Event
Choice C
$P (N o t w h i t e)$ $= 1 - P (W h i t e)$ $= 1 - \frac{12}{21}$ $= \frac{9}{21}$ $= \frac{3}{7}$
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