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Question 9 (1 point) Listen Marks on a Chemistry test follow a normal distribution with a mean of 70 and a standard deviation 10. Approximately

Question 9 (1 point) Listen Marks on a Chemistry test follow a normal distribution with a mean of 70 and a standard deviation 10. Approximately what percentage of the students scored below a grade of 50? a) 97.5 O b) 2.5 (9 5 O d) 47.5

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