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666
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Five 6-sided dice are rolled. What is the probability that exactly two of the dice show a 1 or a 2?

 Nov 5, 2017
 #1
avatar+98125 
+2

I think this is correct.....we have a binomial probability...

 

Probability that a die shows a 1 or 2  = 1/3

Probability that it shows something else  = 2/3

 

We want to choose  any two of the five die to show a 1 or a 2...so we have.... 

 

C (5,2) (1/3)^2 (2/3)^3  =  80 / 243   ≈  32.9 %

 

 

cool cool cool

 Nov 6, 2017
edited by CPhill  Nov 6, 2017
 #2
avatar+637 
0

Thanks!!!

supermanaccz  Nov 6, 2017

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