1 Box I contains 3 red and 5 white balls Box II contains 4 r

1. Box I contains 3 red and 5 white balls, Box II contains 4 red and 2 white balls. One ball is selected from Box I and placed in Box II and then a ball is selected from Box II. What is the probability that it is white?

2.

Solution

1) a white ball is drawn from 1st box ->5*3/8*7
2) a red ball--------------------> 3*2/8*7
sum both: 21/56