There are 6 purple cards and 6 black cards in a bag. One card is selected at random. What is the probability of NOT selecting a black card?
- 6 purple cards
- 6 black cards
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 black is selecting any other color.
- There are 6 non-black cards out of 12 total cards.
- 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.