 Solution

ID: past-exam-of-the-mathematics-course-of-the-year-1-of-the-natural-sciences-course-of-the-university-of-cambridge/2019/paper-1/16/b/ii/solution

For sampling with replacement, the box has its original contents at the second draw. Therefore

P (B_{2}) = \frac{2}{5} (r = 1) .

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