+0  
 
+1
2611
2
avatar+653 

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+128055 
+3

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+653 
0

Thanks!!!

supermanaccz  Nov 6, 2017

2 Online Users

avatar