GMAT Practice Question: If the probability that event E will occur is k, then the probability that event E...
Question
If the probability that event E will occur is k, then the probability that event E will not occur is
- 1-k
- k-1
- 1-k^2
- k^2-1
- k/2
Topics: probability
Solution
Step 1
We apply Inverse Probability Rule to relate the probability of an event and the probability of its complement
P(not E) = 1 - P(E)
Step 2
We substitute k for P(E) to find the probability that event E will not occur
P(not E) = 1 - k
Answer
A
