Posted by Ali on Wednesday, March 31, 2010 at 6:53pm.
There are 20 red yellow and green tiles in a bag. 1/2 of the tiles are not yellow. 1/5 of the tiles are red. What is the probability of randomly selecting a colored tile from the bag that is NOT green?

Probability/Stas  kate, Wednesday, March 31, 2010 at 6:56pm
10
20

Probability/Stas  kate, Wednesday, March 31, 2010 at 7:20pm
does that mean sixty of them

Probability/Stat (correction)  PsyDAG, Thursday, April 1, 2010 at 11:47am
1/5 = 4/20, so 4 tiles are red.
1/2 or 10 are not yellow, so they are either red or green. Since 4 are red, the remaining 6 are green.
Probability of NOT green = 1  6/20 = ?
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