Probability, Help Please?

Probability, Help Please?



Brad is taking a course in probability theory. Discussion sessions with the class TA (teaching assistant) conflict with Brad's trips to the beach.Brad has to decide between a probability course, and going to the beach. 
Brad learns that 95 percentage of past students who did not attend TA sessions received a grade of B or below in the course. 
Brad also learns that 14 percentage of past students received a grade higher than B. After some thought, Brad decides to attend the TA sessions. 
Not all of his classmates share his decision; in fact, only 9 out of every 13 of his classmates attend discussion sessions with the TA. 
Compute the probability that Archie will receive a grade higher than a B in the course. 
Round the answer to two decimal places





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