Question
A number cube with sides labeled 1 through 6 is rolled two times, and the sum of the numbers that end face up is calculated. What is the probability that the sum of the numbers is 3?
Answers
Reiny
rolling the same die twice is no different than rolling 2 dice.
to get a three ...
1 2
2 1 ----> two ways
prob(3) = 2/36 = 1/18
to get a three ...
1 2
2 1 ----> two ways
prob(3) = 2/36 = 1/18