Three bags contain a number of red and white balls as follows:

Question

Bag 1:3 red balls,Bag 2:2 red balls and 1 white ball. Bag 3:3 white balls. The probability that bag i will be chosen and a ball is selected from it is $\Large \frac{i}{6}$, i=1,2,3.If a white ball is selected,what is th probability that it came from $$(i)\;Bag \;2\quad(ii)\;Bag\; 3$$