Jose has a bag of 6 blue marbles, 3 white marbles, and 8 black marbles. What is the probability that he pulls a blue marble out of the bag?

First you add all marbles so you know how many there are:

6+3+8= 17

Then, to find the probability you put the number of marbles which you want to find the probability of being pulled out on top of the fraction and make it out of 17

6/17

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