A box contains 8 orange counters, 9 green counters, and 1 yellow counters. If one counter is chosen without looking, what is the probability that it is yellow?
- 8 orange counters
- 9 green counters
- 1 yellow counters
Choose the best answer.
Note
For basic probability, compare the number of favorable outcomes with the total number of equally likely outcomes.
- Count the favorable outcomes first: there are 1 yellow counters.
- Then count all possible outcomes: 8 + 9 + 1 = 18.
- Probability means favorable outcomes divided by total outcomes, so the probability is 1/18, which simplifies to 1/18.
The correct answer is 1/18. This matches the calculation or definition, so students should focus on the reasoning rather than only memorizing the final value.