Correct Answer: Option A

Explanation

Prob(RB + BR) = Total balls = 4 + 6 = 10

= prob(\(\frac{4}{10} \times \frac{6}{9}\)) + prob(\(\frac{6}{10} \times \frac{4}{9}) = \frac{24}{90} + \frac{24}{90}\)

= \(\frac{48}{90} = \frac{16}{30} = \frac{8}{15}\)

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