A bag contains 3 red, 5 blue, and 2 green balls. If one ball is drawn at random, what is the probability of drawing a blue ball?

• A. 1/2
• B. 1/3
• C. 5/6
• D. 1/5

Answer: (A)

Probability is found by comparing the number of favorable outcomes to the total number of possible outcomes, since each outcome is equally likely. Here, there are 10 balls in total and 5 of them are blue. So the chance of drawing a blue ball is 5 out of 10, which simplifies to 1/2. That matches the correct choice because it directly reflects the bag’s actual composition. The other options would require a different count of blue balls or a different total number of balls, which isn’t the case here.