# Probability

• Aug 11th 2010, 02:05 AM
winsome
Probability
Four fair dice are tossed. Find the probability of the dice showingat most 3 fives.
• Aug 11th 2010, 02:47 AM
Chris L T521
Quote:

Originally Posted by winsome
Four fair dice are tossed. Find the probability of the dice showingat most 3 fives.

Its the same as considering $1-\mathbb{P}(\text{rolling 4 fives})$. Since each die result is independent of the others, what do you think is the value of $\mathbb{P}(\text{rolling 4 fives})$?
• Aug 11th 2010, 02:47 AM
guildmage
You are asked to find the probability of the dice showing at most three 5's. Have you considered finding the probability of the dice showing one 5, two 5's, and three 5's?

Have you done some initial investigation? What were your results?
• Aug 11th 2010, 03:06 AM
CaptainBlack
Quote:

Originally Posted by guildmage
You are asked to find the probability of the dice showing at most three 5's. Have you considered finding the probability of the dice showing one 5, two 5's, and three 5's?

Have you done some initial investigation? What were your results?

zero 5s?

CB