The probability of rolling an even number on a fair die is what?

The probability of rolling an even number on a fair die is what?

• A. 1/3
• B. 2/3
• C. 1
• D. 1/2

Answer: (D)

On a fair six-sided die, every face is equally likely. There are three even faces (2, 4, and 6) out of six total faces, so the probability is 3/6, which simplifies to 1/2. This means half the time you’ll roll an even number. The other options don’t fit because they’d require a different count of even faces (two evens would be 1/3, four evens would be 2/3) or certainty (one would mean every roll is even), which isn’t true for a standard die.

On a fair six-sided die, every face is equally likely. There are three even faces (2, 4, and 6) out of six total faces, so the probability is 3/6, which simplifies to 1/2. This means half the time you’ll roll an even number. The other options don’t fit because they’d require a different count of even faces (two evens would be 1/3, four evens would be 2/3) or certainty (one would mean every roll is even), which isn’t true for a standard die.