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Mathematics 13 Online
OpenStudy (anonymous):

probability help

OpenStudy (anonymous):

A jar contains coins that are all mixed up. You pick out 20 coins. From this selection, 15 turn out to be gold, 3 are silver, and the remaining coins are bronze. If the jar contains 20 gold coins, 30 silver coins, and 50 bronze coins, what is the experimental probability of picking a bronze coin?

OpenStudy (anonymous):

A. 50% B. 10% C. 4%D. 2%

OpenStudy (amistre64):

how many bronze picked --------------------- how many coins picked

OpenStudy (amistre64):

or quite possibly the dividor is the number of coins in the jar .....

OpenStudy (amistre64):

if im right, ts either B or D :) how do we narrow that down?

OpenStudy (anonymous):

so coins picked or coins in tha jar?

OpenStudy (anonymous):

i think it might be b.

OpenStudy (amistre64):

i wonder if "replacement or not" matters ... prolly not

OpenStudy (anonymous):

i think it is coins picked

OpenStudy (amistre64):

i think its coins in jar .... 2 out of 100 is what the experiment gives us

OpenStudy (amistre64):

coins picked is just a sample size

OpenStudy (anonymous):

it seems like coins picked out

OpenStudy (anonymous):

yes that makes more sense 2 out 100

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