What is the theoretical probability of rolling a number less than 4?

1/2 or 3/6

Step-by-step explanation:

on a die theirs 6 numbers, and the numbers 1,2,3 are less than 4. So out the the six numbers 3/6 are les than 4 and 1/2 and 3/6 are equivalent.

The answer is 3/6 or 1/2