You roll two number cubes. Find the probability that the sum of the cubes is 5 or less? (Round to 3 decimal places)

1 Answer

#10/36=.2bar7~=.278#

Explanation:

Out of 36 possible combinations, we can get:

#((color(white)(0),ul1,ul2,ul3,ul4,ul5,ul6),(1|,2,3,4,5,6,7),(2|,3,4,5,6,7,8),(3|,4,5,6,7,8,9),(4|,5,6,7,8,9,10),(5|,6,7,8,9,10,11),(6|,7,8,9,10,11,12))#

There are 10 ways to get a sum of two fair regular cubes that is less than or equal to 5. This gives a probability of:

#10/36=.2bar7~=.278#