There are 6 blue stickers and 6 black stickers in a bag. One sticker is selected at random. What is the probability of NOT selecting a blue sticker?
- 6 blue stickers
- 6 black stickers
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 blue is selecting any other color.
- There are 6 non-blue stickers out of 12 total stickers.
- So the probability is 6/12 = 1/2.
- A complement probability can also be found by doing 1 minus the probability of the event.
The correct answer is 1/2. This matches the calculation or definition, so students should focus on the reasoning rather than only memorizing the final value.