Two classes take the same examination, and the grades are recorded in Table 16. We assigned the integers 0 through 4 to the grades F through A, respectively. Table 16 gives the frequency distribution of grades in each class. Find the relative frequency distribution and the histogram
for each class. Describe the difference in the grade distributions for the two classes.

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Table 16 Number of Students 9 A.M. Class Grade 10 A.M. Class (0) 10 17 D (1) 15 20 (2) 20 17 (3) 10 20 (4) 26