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The time it takes (for any student) to complete the MGCR271 final exam is a random variable having a normal distribution with mean 160 minutes
The time it takes (for any student) to complete the MGCR271 final exam is a random variable having a normal distribution with mean 160 minutes and standard deviation 15 minutes. Anne, Bob, Clara and Dave are four friends writing this exam. What is the probability that at least one of them will complete the exam in less than 145 minutes? (Assume that their completion times are independent.)
A. Between 0.35 and 0.45
B. Between 0.01 and 0.35
C. Greater than 0.55
D. Less than 0.01
E. Between 0.45 and 0.55
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