Using weighed mean, it is found that the final grade is 64.73.
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To find the weighed average, we multiply each grade by it's weight.
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Since we want to find the weighed average, we have to identify in the text the grades, and it's respective weighs.
Thus, the final grade is:
[tex]F = 71\times0.67 + 52\times0.33 = 64.73[/tex]
The final grade was of 64.73.
A similar problem is given at https://brainly.com/question/23731238