Normal Distribution Conditional Probability
The time required for a student to complete a standardized test is normally distributed with a mean of 65 minutes and a standard deviation of 12 minutes. The time allotted for the test is 90 minutes. Given that a student takes at least 50 minutes on the test, what is the probability that this student finishes within the allotted time?
A
0.9790
B
0.9772
C
0.8185
D
0.7734
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