Question

b) calculate the new weighted average using the same grades but the different weights as shown below.
grade item grade weight
assignments 47 5
midterm 1 64 10
midterm 2 96 10
final exam 90 75
weighted average:

Explanation:

Step1: Calculate the product of each grade - item and its weight

$47\times5 = 235$, $64\times10=640$, $96\times10 = 960$, $90\times75=6750$

Step2: Calculate the sum of the products

$235 + 640+960 + 6750=8585$

Step3: Calculate the sum of the weights

$5 + 10+10 + 75=100$

Step4: Calculate the weighted - average

$\frac{8585}{100}=85.85$

Answer:

$85.85$