Grade Stats
10 Points
reduce
Instructions
You are a teacher. At the end of the year, you have generated a numeric grade for each of your students. Now you need to translate that to a letter grade and count how many students have achieved each letter grade
1. Translate a numeric grade to a letter grade
The letter_grade function will take a numeric grade as input, and it will output the letter.
Use these ranges:
| Letter | Grade |
|---|---|
| A | 90% - 100% |
| B | 80% - 89% |
| C | 70% - 79% |
| D | 60% - 69% |
| F | 0% - 59% |
Example:
75 | letter_grade # => "C"2. Count the number of students for each letter grade
The function count_letter_grades will take an object mapping student names to their grades.
The output will be an object mapping each letter grade to the number of students with that grade.
Example:
{"Joe": 78, "Jane": 93, "Richard": 72} | count_letter_grades
# => {"A": 1, "B": 0, "C": 2, "D": 0, "F": 0}There are a few different ways to solve this.
Use the reduce filter for practice.
Grade Stats
10 Points
reduce
Instructions
You are a teacher. At the end of the year, you have generated a numeric grade for each of your students. Now you need to translate that to a letter grade and count how many students have achieved each letter grade
1. Translate a numeric grade to a letter grade
The letter_grade function will take a numeric grade as input, and it will output the letter.
Use these ranges:
| Letter | Grade |
|---|---|
| A | 90% - 100% |
| B | 80% - 89% |
| C | 70% - 79% |
| D | 60% - 69% |
| F | 0% - 59% |
Example:
75 | letter_grade # => "C"2. Count the number of students for each letter grade
The function count_letter_grades will take an object mapping student names to their grades.
The output will be an object mapping each letter grade to the number of students with that grade.
Example:
{"Joe": 78, "Jane": 93, "Richard": 72} | count_letter_grades
# => {"A": 1, "B": 0, "C": 2, "D": 0, "F": 0}There are a few different ways to solve this.
Use the reduce filter for practice.