Final answer:
The student's question about tallying grades is organized by creating tallies for each grade category: A, B, C, and D, with A's and B's each appearing 6 times, C's 5 times, and D's 3 times.
Step-by-step explanation:
To organize the grades of 20 students using tally marks, we first need to list out all the grades that were given, then tally them according to the number of times each grade appears. In tally marking, we use vertical bars to represent each occurrence, and for every fifth occurrence, a diagonal bar crosses the previous four.
- Grade A: |||| |
- Grade B: |||| |
- Grade C: |||| |
- Grade D: |
From the data provided, here is how the tally marks would look like:
- A's: |||| | (6 times)
- B's: |||| | (6 times)
- C's: |||| | (5 times)
- D's: | (3 times)
The grades are tallied into four categories: A, B, C, and D. This method effectively organizes and visualizes the frequency of each grade.