We have a bag with 4 red marbles and 9 blue marbles.
You draw three marbles out of the bag without replacement.
(a) What is the probability that you got a red, blue, and red marble in that order?
(b) What is the probability of not getting any blue marbles?
(c) What is the probability you got two red and one blue marble, in any order?

Question

We have a bag with 4 red marbles and 9 blue marbles.
You draw three marbles out of the bag without replacement.
(a) What is the probability that you got a red, blue, and red marble in that order?
(b) What is the probability of not getting any blue marbles?
(c) What is the probability you got two red and one blue marble, in any order?

triciaal · Answer

A) NO REPLACEMENTS I LESS EACH TIME
RED = 4/13 THEN BLUE 9/12 THEN RED 3/11

anonymous · Answer

oh well, latex still not working

triciaal · Answer

B)no blues no replacement
4/13  3/11  2/10

anonymous · Answer

@triciaal i got that far for A, do I multiple them now?

triciaal · Answer

yes

triciaal · Answer

correction on b)  13 then 12 then 11

anonymous · Answer

But I thought you only multiply independent events. would that be conditional?

triciaal · Answer

it said in that order    double check then

triciaal · Answer

have an appt in 10 mins  got to run   i can check back later if you still need help

anonymous · Answer

ok