The answer is C but how do you arrive at it For each questio

The answer is C but how do you arrive at it?

For each question on a multiple-choice test, there are five possible answers of which exactly one is correct. Suppose that there are 15 questions and the passing grade is 9 or more. If a student is prepared and the probability that s/he can answer correctly is about 70% for any question, what is the probability that s/he will pass the exam? 0.7000 0.7216 0.8689 0.9500 0.9958