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PLEASE SHOW FORMULA TO USE IN EXCEL In a statistics mid-term exam graded out of 100 points, the distribution of the exam scores was bi-modal

PLEASE SHOW FORMULA TO USE IN EXCEL

In a statistics mid-term exam graded out of 100 points, the distribution of the exam scores was bi-modal with a mean of 70 points with a standard deviation of 10 points. What percentage of students scored between 40 points and 100 points?

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