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The time it takes to complete a Sta220 term test is normally distributed with a mean of 100 minutes with standard deviation of 14 minutes. How much time should be allowed if we wish to ensure that at least 9 out of 10 students (on average) can complete it? (round to the nearest minute)

A) 115
B) 116
C) 117
D) 118
E) 119

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