SOLUTION: a student's final marks in mathematics, physics, English and Geography are 70,65,80,85 respectively. if the respective credits received for these courses are 3,2,3 and 1. a. Deter

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Question 1073430: a student's final marks in mathematics, physics, English and Geography are 70,65,80,85 respectively. if the respective credits received for these courses are 3,2,3 and 1.
a. Determine the mean mark of the student.
b.what is this type of mean called?
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
70 * 3 = 210
65 * 2 = 130
80 * 3 = 240
85 * 1 = 85

total score multiplied by the number of credits for each score is 210 + 130 + 240 + 85 = 665

total credits are 3 + 2 + 3 + 1 = 9

average is 665 / 9 = 73.89.

this is called a weighted average.