There are 3 yellow tiles and 2 blue tiles in a bag. One tile is selected at random. What is the probability of NOT selecting a yellow tile?
- 3 yellow tiles
- 2 blue tiles
Choose the best answer.
Note
For a “not” event, count the outcomes outside the named event. This is the complement of the event.
- The complement of selecting yellow is selecting any other color.
- There are 2 non-yellow tiles out of 5 total tiles.
- So the probability is 2/5 = 2/5.
- A complement probability can also be found by doing 1 minus the probability of the event.
The correct answer is 2/5. This matches the calculation or definition, so students should focus on the reasoning rather than only memorizing the final value.