What is the probability of rolling an even number on a fair six‑sided die?

• A. 1/3
• B. 1/2
• C. 1/6
• D. 2/3

Answer: (B)

Probability is found by dividing the number of favorable outcomes by the total number of possible outcomes when all outcomes are equally likely. A fair six‑sided die has six equally likely results: 1 through 6. The even results are 2, 4, and 6 — three favorable outcomes. So the probability of rolling an even number is 3/6, which simplifies to 1/2. This is why the correct choice is the one that equals one-half.

The other options would require having two, one, or four favorable outcomes out of six, which isn’t the case here since there are three even faces.