Find the following quiz average for a class of 20:
On a quiz worth 5 points, four students earned a 5, seven students earned a 4, six students earned a 3, two students earned a 2, and one student earned a zero.
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To find the average quiz score, you need to calculate the total points earned by all the students and divide it by the total number of students.
First, calculate the total points earned by each score:
- Four students earned a 5: 4 x 5 = 20 points
- Seven students earned a 4: 7 x 4 = 28 points
- Six students earned a 3: 6 x 3 = 18 points
- Two students earned a 2: 2 x 2 = 4 points
- One student earned a 0: 1 x 0 = 0 points
Next, sum up the total points earned:
20 + 28 + 18 + 4 + 0 = 70 points
Finally, divide the total points earned by the number of students to find the average:
70 / 20 = 3.5
Therefore, the average quiz score for the class of 20 is 3.5.
To find the average quiz score for the class, follow these steps:
1. Calculate the total points earned by all the students:
- Four students earned a 5, so they contributed 4 * 5 = 20 points.
- Seven students earned a 4, so they contributed 7 * 4 = 28 points.
- Six students earned a 3, so they contributed 6 * 3 = 18 points.
- Two students earned a 2, so they contributed 2 * 2 = 4 points.
- One student earned a zero, so they contributed 0 points.
- Summing them all up: 20 + 28 + 18 + 4 + 0 = 70 points.
2. Calculate the total number of students in the class, which is 20.
3. Divide the total points earned by the total number of students to find the average:
- Average = Total points earned / Total number of students
- Average = 70 points / 20 students
- Average = 3.5 points
Therefore, the average quiz score for the class of 20 students is 3.5 points.