A standard number cube with the numbers 1 through 6 Is rolled. Find the probability of rolling a number less than 4.
There are three numbers less than 4 on the cube: 1, 2, and 3.
The total number of possible outcomes when rolling the cube is 6, since there are 6 faces on the cube.
Therefore, the probability of rolling a number less than 4 is:
# of favorable outcomes / total # of possible outcomes
= 3/6
= 1/2
So the probability of rolling a number less than 4 is 1/2 or 50%.