Answer:
Overall Final Score = 83.7
Letter Grade = B
Step-by-step explanation:
To calculate weighted marks (grade), the rule is to multiply each weight (in decimal) with respective marks and add them together. Let's do this:
Overall final score = (0.10*74) + (0.25*93) + (0.50*83) + (0.15*77) = 83.7
From the information given, we know that score between 80 and 90 is a "B".