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July 22, 2014

July 22, 2014

Posted by **miki** on Wednesday, March 28, 2012 at 5:04pm.

- math -
**Reiny**, Wednesday, March 28, 2012 at 5:48pmthe ratios of

black : blue : red = 54:36:30 = 9:6:5

let the number black be 9x

let the number of blues be 6x

let the number of reds be 5x

9x + 6x + 5x = 20

20x = 20

x = 1

so 9 black, 6 blue, and 5 red

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