A box contains 4 yellow buttons, 8 orange buttons, and 1 blue buttons. If one button is chosen without looking, what is the probability that it is yellow?
- 4 yellow buttons
- 8 orange buttons
- 1 blue buttons
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 4 yellow buttons.
- Then count all possible outcomes: 4 + 8 + 1 = 13.
- Probability means favorable outcomes divided by total outcomes, so the probability is 4/13, which simplifies to 4/13.
The correct answer is 4/13. This matches the calculation or definition, so students should focus on the reasoning rather than only memorizing the final value.