151k views
4 votes
A fair die will be rolled 12 times. what is the probability that 4 , 5 , or 6 is rolled less than 6 but more than 3 times

User Biox
by
8.7k points

1 Answer

6 votes
P(4,5 or 6)=3/6=1/2 and we need to find
P(4 times or 5 times... getting 4,5 or 6) = P(4 times ...)+ P(5 times...)
=(1/2)^12 + (1/2)^12 = (1/2)^11

i'm not very sure if its correct. but, u can use this as your last resort. something is better than nothing. and let me know if its right.

User Prasannjeet Singh
by
7.8k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories