a) 0.25 and b) 0.5 ..?
@prashant jha 1
yes it is 2/3 for the first Q.
And 5/6 for the second
Can you explain how you solved it?
Solved here https://math.stackexchange.com/questions/318362/conditional-probability-with-balls-in-an-urn
Thanks @MiNiPanda for the link .