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Mathematics 16 Online
OpenStudy (anonymous):

A bag contains five yellow marbles, nine red marbles, three blue marbles, six white marbles, and seven black marbles. What is the theoretical probability of pulling a black marble from the bag?

OpenStudy (sirm3d):

# of black marbles divided by total # of marbles in the bag

OpenStudy (anonymous):

none of the answer match up

OpenStudy (sirm3d):

what are the choices?

OpenStudy (anonymous):

7/30 3/10 7/23 6/25

OpenStudy (sirm3d):

how many marbles are in the bag?

OpenStudy (anonymous):

30

OpenStudy (sirm3d):

how many black marbles are there?

OpenStudy (anonymous):

its also asking for the theoretical probability

OpenStudy (sirm3d):

i know that. can't you see (# black marbles) / (total # of marbles) among the choices?

OpenStudy (anonymous):

yes

OpenStudy (sirm3d):

# black marbles = 7 total # of marbles = 30 just form the fraction

OpenStudy (anonymous):

oh i got confused

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