Algebra
Lesson 3-9
Weighted Averages
Vocabulary:
- weighted average-The sum of the product of the number of units and the value per unit divided by the sum of the number of units, represented by M.
- mixture problems-Problems in which two or more parts are combined into a whole.
- uniform motion problem-Problems in which an object moves at a certain speed, or rate. d=rt is the formula used to solve these problems.
Examples:
* What would Chon Wang's GPA be if these were his grades, and if A's were worth 4, B's were worth 3, and C's were worth 2?
Class | Credit | Grade |
| Algebra | 1 | A |
Science | 1 | B |
| Language Arts | 1 | C |
| Social Studies | 1 | B |
| Music | 1/2 | A |
| P.E. | 1/2 | A |
4(1) + 3(1) + 2(1) + 3(1) + 4(1/2) + 4(1/2)
4 + 1/2 + 1/2
= 16
5
=3.20
So Chon Wang's GPA is 3.20
*
Additional Information:
Online resource:
More Examples from Lesson 3-9
Pictures:
This page by: ~LH~ CK