+0  
 
0
90
1
avatar+8 

If I roll a fair, regular six-sided die four times, what is the probability that I will roll the number  exactly three times?

off-topic
tlin0611  Dec 23, 2017
edited by Guest  Dec 23, 2017
Sort: 

1+0 Answers

 #1
avatar+81063 
+1

We have a (1/6)  probability of rolling any number on any roll.....so...to roll the same number three times out of four we have

 

C(4,3)  (1/6)^3 (5/6)  =  5/324  ≈ 1.5%

 

 

cool cool cool

CPhill  Dec 23, 2017

15 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details