Two balls draw at random from a bag containing 4 \( \mathrm{P} \) r...

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Two balls draw at random from a bag containing 4
\( \mathrm{P} \) red and 6 black balls. Find the probability that one

W is red and another is black.
(1) \( \frac{6}{15} \)
(2) \( \frac{7}{15} \)
(3) \( \frac{8}{15} \)
(4) \( \frac{9}{15} \)
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