Cumulative Probability for a Discrete Distribution
The provided table shows the probability distribution for scores on an exam. A student must achieve a score of 3 or higher to receive college credit. Which of the following correctly describes the calculation for the probability that a randomly selected student does not receive college credit?
| Score | Probability |
|---|---|
| 1 | 0.211 |
| 2 | 0.197 |
| 3 | 0.215 |
| 4 | 0.211 |
| 5 | 0.166 |
A
Adding the probabilities for scores 1 and 2: shows a 40.8% chance of not receiving college credit.
B
Multiplying the probabilities of scores 1 and 2 to find the cumulative failure rate.
C
Subtracting the probability of a score of 3 from 1 to get the probability of failure.
D
Taking the average probability of scores 1 and 2 as representative of overall failure.
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