Question

a) calculate the weighted average for the following set of data: grade item grade weight assignments 47 10 midterm 1 64 25 midterm 2 96 25 final exam 90 40 weighted average:

Explanation:

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

$47\times10 = 470$, $64\times25=1600$, $96\times25 = 2400$, $90\times40=3600$

Step2: Calculate the sum of the weights

$10 + 25+25 + 40=100$

Step3: Calculate the sum of the products

$470+1600 + 2400+3600=8070$

Step4: Calculate the weighted - average

$\frac{8070}{100}=80.7$

Answer:

$80.7$