Posted by **Nick** on Thursday, October 4, 2012 at 9:55pm.

A jar contains red, blue and yellow marbles.The number of red marbles is ten more than the number of yellow marbles and the number of blue marbles is double the number of yellow marbles. If the probability of choosing a yellow marble is one-fifth , how many marbles are in the jar?

- Algebra -
**Reiny**, Thursday, October 4, 2012 at 10:07pm
yellow marbles ---- x

blue marbles ------ 2x

red marbles ------- x+10

total = 4x + 10

prob to choose a yellow = x/(4x+10) = 1/5

5x = 4x+10

x = 10

10 yellows , 20 blues, and 20 reds for a total of 50 marbles

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