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. What is the probability the ball drawn from box 3 is white? What is the probability the ball drawn from box 3 is black? Box 1

6 white

4 black

Box 2

4 white

3 black

Box 3

1 white

2 black

a) What is the probability that the last ball, drawn from box 3, is white?