Suppose, we have four boxes A, B, C and D containing coloured marbles as given below : One of the boxes has been selected at random and a single marble is drawn from it. If the marble is red, what is the probability that it was drawn from box A? box B? and box C?

Question

	Red	White	Black
A	1	6	3
B	6	2	2
C	8	1	1
D	0	6	4