Weighted Average Lesson

4.12 Weighted Averages Lesson

Multiple Choice

Mandy earns money by delivering groceries. She earned
$4 on Monday, $7 on Tuesday, $5 on Wednesday, $4 on
Thursday, and $5 on Friday. What is the average amount
of money Mandy earned per day?

• 25
• 5
• 21

Multiple Choice

Student ID number consists of 6 characters. The first four characters can be any number without restrictions. The last two characters are letters and cannot repeat. How many student IDs are possible? 

• 6,760,000
• 4,738,500
• 6,500,000

Weighted Averages

• Different "weights"- i.e.- percentages; are applied to different categories of the average

• Your grade in this class is an example of a weighted average

• It is an average resulting from the multiplication of each component by a factor reflecting its importance.

Multiple Choice

an average resulting from the multiplication of each component by a factor reflecting its importance.

• Ervin, Brandon, and Gage need really loud alarm clocks. 
• weighted average 
• letterbox
• pillarbox

Multiple Choice

Why would you use a weighted average instead of a traditional average calculation?

• Because you have a lot of numbers
• Because the value you are trying to calculate is made up of categories which each have different weights.

Multiple Choice

Find the class grade for a student with grades: Test 89%, Quiz 92, Homework 86%, and Classwork 95%.
Tests are 60% of the grade, Quiz 15%, Homework is 10% of the grade, and Classwork is 15% of the grade.

• 89.25
• 91.55
• 90.05
• i don't know

Multiple Choice

If I have a 85 average for Daily (20%) and a 75% average for Minor (30%), what do I need for a Major average (50%) to have a 83 average overall?

• 81
• 83
• 87
• 89