Question

HELP ASAP!!!
A bag has 2 blue marbles, 3 green ones and 1 brown marble. Outcome A is drawing a blue marble on the firsts draw. Outcome B is drawing a brown marbl on the second draw without replacing the first marble.
What is P(B|A)?
Answers:
1/2
1/3
1/4
1/5
1/6
1/7

Answer 1

i think it is 1/6  i hope this helps

Answer 2

The probability of B, given that A has happened, P(B|A) would mean the chance of getting a brown marble after having drawn a blue one without putting the blue on back in.  With the blue one missing there are only 5 marbles left in the bag (1 blue, 3 green, and 1 brown)  The chances of getting that one brown marble out of the 5 in the bag is 1/5.