Correct Answer: Option A

Explanation

P(one blue, other red) = P(1st red then blue) or P(1st blue then red)

= \((\frac{4}{7} \times \frac{3}{6}) + (\frac{3}{7} \times \frac{4}{6})\)

= \(\frac{2}{7} + \frac{2}{7} = \frac{4}{7}\)

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