# 3. In Problem 2, suppose that the white balls are numbered, and let Y i equal 1...

## Question:

3. In Problem 2, suppose that the white balls are numbered, and let Y_{i} equal 1 if the ith white ball is selected and 0 otherwise. Find the joint probability mass function of

**(a)** Y_{1}, Y_{2}

**(b)** Y_{1}, Y_{2}, Y_{3}

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