Final answer:
The probability of rolling a number less than 5 and even on a die is 1/2.
Step-by-step explanation:
To find the probability of rolling a number less than 5 and even, we need to determine the number of outcomes that satisfy both conditions and divide it by the total number of possible outcomes.
There are three outcomes that satisfy both conditions: {2, 4, 6}. The total number of possible outcomes is six since a die has six sides.
Therefore, the probability of rolling a number less than 5 and even is 3/6, which simplifies to 1/2.