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A red die, a blue die, and a yellow die (all six sided)
Chapter 3, Problem 22P(choose chapter or problem)
Problem 22P
A red die, a blue die, and a yellow die (all six sided) are rolled. We are interested in the probability that the number appearing on the blue die is less than that appearing on the yellow die, which is less than that appearing on the red die. That is, with B, Y, and R denoting, respectively, the number appearing on the blue, yellow, and red die, we are interested in P(B < Y< R).
(a) What is the probability that no two of the dice land on the same number?
(b) Given that no two of the dice land on the same number, what is the conditional probability that B < Y < R?
(c) What is P(B < Y < R)?
Questions & Answers
QUESTION:
Problem 22P
A red die, a blue die, and a yellow die (all six sided) are rolled. We are interested in the probability that the number appearing on the blue die is less than that appearing on the yellow die, which is less than that appearing on the red die. That is, with B, Y, and R denoting, respectively, the number appearing on the blue, yellow, and red die, we are interested in P(B < Y< R).
(a) What is the probability that no two of the dice land on the same number?
(b) Given that no two of the dice land on the same number, what is the conditional probability that B < Y < R?
(c) What is P(B < Y < R)?
ANSWER:
Step 1 of 3
Given that there are three dice blue, yellow and red dice
Let B denotes blue die
Let Y denotes yellow die
Let B denotes red die
Then
a) We have to find the probability that no two of the dice land on the same number
Here no two of the dice land on the same number means
All the three dice shows the different numbers
Then 6 choices for red die
And 5 choices for yellow die
And 4 choices for blue die
The possible no.of combinations are 6(5)(4)=120
The total possible no.of combinations are 63=216
Let E be the event that the probability of no two of the dice land on the same number
Then the probability of no two of the dice land on the same number P(E)=120/216
=0.556
Hence probability that no two of the dice land on the same number is 0.556