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A bag contains two red beads and two green beads. You reach into the bag and pull out a bead, replacing it with a red bead regardless of the color you pulled out. What is the probability that all beads in the bag are red after three such replacements? Express your answer as a common fraction.

 Jun 2, 2019
 #1
avatar+6034 
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deleted

 Jun 2, 2019
edited by Rom  Jun 2, 2019
 #2
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I get the following:

 

 Jun 2, 2019
 #3
avatar+6034 
+1

Alan is correct as usual.

 

Rom  Jun 2, 2019

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