A multiple choice exam has 60 questions. Each question has 4 possible answers and only 1 answer out of the 4 possible answers is correct.

A multiple choice exam has 60 questions. Each question has 4 possible answers and only 1 answer out of the 4 possible answers is correct. To receive an A grade, one must answer 95% and above of the questions correctly. We know that 54 questions were answered correctly. What is the probability of receiving an A grade (to 3 dcp) if one were to guess the remaining questions?

A: 0.169

B: 0.466

C: 0.500

D: 0.743