3 fair and unbiased dice are rolled at a time the probability that num...
Calculating the probability of rolling 3 different numbers on 3 dice:
To calculate the probability of rolling 3 different numbers on 3 dice, we need to first determine the total number of possible outcomes when rolling 3 dice.
Determining the total number of possible outcomes:
When rolling 3 dice, each die can land on one of 6 possible numbers. Therefore, the total number of possible outcomes is:
6 x 6 x 6 = 216
Determining the number of outcomes where all 3 numbers are different:
To determine the number of outcomes where all 3 numbers are different, we can use the following formula:
n! / (n-r)!
Where n is the total number of possible outcomes (216) and r is the number of dice being rolled (3).
Using this formula, we get:
6! / (6-3)! = 6 x 5 x 4 = 120
Therefore, there are 120 possible outcomes where all 3 numbers are different.
Calculating the probability:
To calculate the probability of rolling 3 different numbers on 3 dice, we simply divide the number of outcomes where all 3 numbers are different by the total number of possible outcomes:
120 / 216 = 5/9
Therefore, the probability of rolling 3 different numbers on 3 dice is approximately 0.556 or 55.6%.
3 fair and unbiased dice are rolled at a time the probability that num...
total no. of outcomes=6^3=216
no. of similar no. = 36+30+30=96
result outcome =216-96=120