The following is a partial histogram illustrating the course grade distribution for an introductory level statistics class. The frequency represents the percent of total students that took the course. The data for a grade of "D" is missing. What is the correct frequency for a grade of "D"? Frequency 45. 40- 35- 30- 25 20- 15- 10- 5- 0 Histogram of Course Grade Course Grade D

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