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A bag contains 13 red marbles, 12 green marbles and 5 blue marbles. If you mix up the marbles and pull one out at random, what is the probability that it will be blue? (Answer as a fraction in lowest terms.)

 Mar 30, 2021
 #1
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5 / 13 + 12 + 5 = 5 / 30 = 1/6

 

 

smileyso yea.

 Mar 30, 2021
 #2
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there are a total of   13 + 12 + 5 = 30 marbles

   5 are blue       5 out of 30 =    5/30 = 1/6                as WDPD found !

 Mar 30, 2021

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