A bag contains 3 yellow, 2 orange and 7 brown marbles. Event A is defined as drawing an orange marble on the first draw and event B is defined as drawing a brown marble on the second draw.
If two marbles are drawn from the bag, one after the other and not replaced, what is P(B|A) expressed in simplest form?
a. 7/11
b. 6/11
c. 1/2
d. 1/6