Asked by Dan
What is the probability that 4 rolls of fair die will show three 4's?
the answer is 0.015, but I don't know how to get it.
the answer is 0.015, but I don't know how to get it.
Answers
Answered by
economyst
Ok, first choose the roll that is NOT a 4. There are 4 possibilities. The probability of rolling NOT a 4 is 5/6. The prob of rolling a 4 is 1/6.
So, the prob with 4 roll of rolling three 4's is: 4*(5/6) * (1/6)^3
So, the prob with 4 roll of rolling three 4's is: 4*(5/6) * (1/6)^3