There are 3 white cards and 10 purple cards in a bag. One card is selected at random. What is the probability of NOT selecting a white card?
- 3 white cards
- 10 purple 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 white is selecting any other color.
- There are 10 non-white cards out of 13 total cards.
- So the probability is 10/13 = 10/13.
- A complement probability can also be found by doing 1 minus the probability of the event.
The correct answer is 10/13. This matches the calculation or definition, so students should focus on the reasoning rather than only memorizing the final value.