SOLUTION: There are red, blue, and yellow balls in a bag. There is 7 red, and 3 blue. The probability of getting a red ball is 1/7. How many yellow balls are there?

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Question 1140975: There are red, blue, and yellow balls in a bag. There is 7 red, and 3 blue. The probability of getting a red ball is 1/7. How many yellow balls are there?
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
.
7%2F%287%2B3%2Bx%29 = 1%2F7.


7*7 = 7 + 3 + x

49 = 10 + x


x = 49-10 = 39.


ANSWER.  39 blue balls.