Question

If you roll two number cubes, what is the probability of their sum being seven or higher

Answer 1

fro sun higher than or 7=(3,4),(3,5),(3,6),(4,3),(4,4)(4,5),(4,6),(2,5),(2,6),(5,2),(5,3),(5,4),(5,5),(5,6),(1,6),(6,1),(6,2),(6,3),(6,4),(6,5),(6,6)
count these and devide by 36 you will have your answer. . .

Answer 2

The sample space has 36 possible combinations of numbers. These can be set out in column form as follows:
6,6 5,6 4,6 3,6 2,6 1,6
6,5 5,5 4,5 3,5 2,5 1,5
6,4 5,4 4,4 3,4 2,4 1,4
6,3 5,3 4,3 3,3 2,3 1,3
6,2 5,2 4,3 3,2 2,2 1,2
6,1 5,1 4,1 3,1 2,1 1,1

Find the number of combinations of numbers on the two dice that give a sum of 7 or greater and divide that number by 36 to find the required probability.