Students who wish to become chartered accountants (C.A.s) must pass a set of exams to qualify. Suppose that in Ontario, the pass rate is 75%.Candidates who fail the exams the first time may take them again later. Of those who fail the first time, 90% pass the second time. What is the probability that a randomly selected student qualifies to become a C.A. with no more than two attempts at passing the exams?
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