MATH1127 (20442) Fall 2018 Quiz: Quiz 3 (Exam Il Review) This Question: 1 pt 7 o

Question

MATH1127 (20442) Fall 2018 Quiz: Quiz 3 (Exam Il Review) This Question: 1 pt 7 of 24 Complete the following statement P(A or B) indicates Choose the correct answer below O A. the probability that event A or event B does not occur in a single trial. OB, the probability that event A occurs in one trial followed by event B in another trial. O C. the probability that in a single trial, event A occurs, event B occurs, or they both occur O D. the probability that A and B both occur in the same trial. Click to select your answer esc

Explanation / Answer

Generally,

P(A or B) = P(A) + P(B) - P(A and B).

( This equation is valid always and only the value of P(A and B) changes depending whether the events A, B are mutually exclusive or independent).

So, option A ie event A or B not occurrig in a single trial is incorrect.

Similarly, option B is incorrect.

Option C is incorrect. We have A occurring, B occurrig less the probability that they both occur.

Option D is correct. Both A and B are occuring in the same trial.

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