Question

In the first box there are 3white, 4red and5 green balls. In the second box there are5 white, 3red and 2green balls. We take one ball out of the first box and transfer it to the second box, and then we draw three balls from the second box. If all the balls drawn from the second box were different colour, what is the probability that the ball we transferred from the first to the second box was red?

Answer 1

Answer:

I do not understand the difference between these three things