Below are three boxes containing black and white balls. The number of each color is noted inside the box. Draw a ball from box 1 and place it in box 2. Then draw a ball from box 2 and place it in box 3. Finally draw a ball from box 3. |Вох 1 Вох 2 Вох 3 3 white 4 white 3 white 2 black 4 black 1 black ..... a) What is the probability that the last ball, drawn from box 3, is white? (Type a simplified fraction.)

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A:

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A:

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A:

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A: