What is the probability of drawing a green ball?

• A. 1/5
• B. 1/4
• C. 1/3
• D. 1/2

Answer: (A)

Probability is the chance of getting a specific outcome when each equally likely outcome is possible. It’s calculated as the number of green balls (favorable outcomes) divided by the total number of balls.

If there are five balls in total and only one of them is green, there is one favorable outcome out of five possible outcomes, giving a probability of 1/5. That’s why this answer is correct. If the total number of balls or the number of green balls were different, the fraction would change accordingly (more greens or fewer total would raise the probability; fewer greens or more total would lower it).