Below is the probability distribution for the number of times students had to take the same exam before passing it.If a student must pass the exam in two tries or less to pass the class,then what is the probability of passing the class?

A) .80
B) .40
C) .20
D) .10

Question

Below is the probability distribution for the number of times students had to take the same exam before passing it.If a student must pass the exam in two tries or less to pass the class,then what is the probability of passing the class?

A) .80 
B) .40 
C) .20 
D) .10

Quizplus · Accepted Answer

To pass the class, a student must pass the exam in two tries or less. Looking at the probability distribution, we can see that the probability of passing in one try is 0.6 and the probability of passing in two tries is 0.2. Adding those probabilities gives us the total probability of passing in two tries or less as 0.8, which is option A.

Below Is the Probability Distribution for the Number of Times