The probability of the occurrence of event A in an experiment is 1/3. If the experiment is performed 2 times and event A did not occur, then on the third trial event A
A) must occur.
B) may occur.
C) could not occur.
D) has a 2/3 probability of occurring.

Question

Quizplus · Accepted Answer

The probability of event A occurring on any given trial is still 1/3, regardless of whether it occurred on previous trials. Therefore, event A may still occur on the third trial. Option A is incorrect because there is no guarantee that event A must occur on the third trial. Option C is incorrect because event A is still possible, it just has not occurred in the previous trials. Option D is incorrect because the probability of event A occurring on any given trial remains 1/3.

The Probability of the Occurrence of Event a in an Experiment