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Mathematics 20 Online
OpenStudy (anonymous):

a container contains 50 green tokens, 20 blue, and 3 red. 2 tokens are pulled randomely. Compute P(FIE). E-you select a non-blue first. F-the second is non-blue

OpenStudy (anonymous):

Can anyone help me?

OpenStudy (zarkon):

without replacement?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

Are you able to help me?

OpenStudy (zarkon):

is this conditional prob...prob of F given E

OpenStudy (anonymous):

I am not really sure..

OpenStudy (zarkon):

\(P(F|E)\) so E has happened so a non-blue has been selected

OpenStudy (anonymous):

I am finding P(FIE) =?

OpenStudy (zarkon):

so there are now only 72 tokens remaining....how many anre non-blue?

OpenStudy (zarkon):

*how many are non-blue?

OpenStudy (anonymous):

still 20 ?

OpenStudy (zarkon):

originally there were 53 non-blue

OpenStudy (anonymous):

so then there are still 53 non-blue

OpenStudy (zarkon):

no...event E has happened...a non-blue has been selected.

OpenStudy (anonymous):

so 52

OpenStudy (zarkon):

correct...so what is the probability?

OpenStudy (anonymous):

52/72?

OpenStudy (zarkon):

correct

OpenStudy (anonymous):

and that is the answer?

OpenStudy (anonymous):

that was simple!

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