Question

An experiment consists of drawing two balls out of an urn with replacement. The urn has 1 red ball, 1 white ball, and 1 blue ball. How many possible outcomes have one white ball?

Answer 1

A 4
B 5
C 6

Answer 2

@jtvatsim Help plz

Answer 3

is the picture there given?

Answer 4

yes

Answer 5

k, working on it

Answer 6

so for this one, we just read off the graph the different paths that have only one white in them.

Answer 7

For example:
Red -> Red does not work
but
Red -> White does work

Answer 8

try it and let me know how many you get.

Answer 9

IDK

Answer 10

alright, so look at all the different possible paths in the picture:
RR
RW
RB
WR
WW
WB
BR
BW
BB
there are 9 of them, how many of those have exactly one W in them?

Answer 11

THERESS 5

Answer 12

@RadEn I think you are right, but it just depends by what they mean by "one white ball" I'm not sure if they mean EXACTLY one, or at least one... let me think.

Answer 13

since theres 5 W's is that my answer

Answer 14

I think so, but it is possible that the answer should be 4, because WW has two whites in it not just one.... it depends on what they mean.

Answer 15

Any thoughts from the rest of you?

Answer 16

it was 4

Answer 17

ok, so that's why they wanted only 4, they were looking for EXACTLY one, not two... tricky fish.

Answer 18

I know lol

Answer 19

I think it safe to assume that we're talking about outcomes that have exactly ONE white ball, not at least one white ball.

There are 9 possible outcomes, as someone has already pointed out, and which is easily seen in the tree diagram.

How many outcomes involve exactly one white ball?