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# What is the probability of picking a red marble from a bag of marbles that have blue and green marbles, I really need to know ASAP for my Math Quiz

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What is the probability of picking a red marble from a bag of marbles that have blue and green marbles, I really need to know ASAP for my Math Quiz tomorrow. Thanks!

Guest Mar 20, 2017
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#1
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Well, the total of marbles (t), the amount of red (r)  marbles.

Take the total of red marbles and put it into a ratio: (r)/(t)

gobromash  Mar 20, 2017
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But gobromash thanks for answering but isnt probability always a fraction.

Thats what my Math teacher Ms.CinCleare says to all the 5th graders.

Guest Mar 21, 2017
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A ratio is a fraction :P Look it up if you dont know what it means btw

gobromash  Mar 22, 2017
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You have to take the number of red marbles and divide it with the number of all the marbles.

red / red+blue+green

Guest Mar 21, 2017

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