A students course greatest based on one midterm that counts as 20% of his final grade one class project that counts at 20% of his final grade a set of homework assignments that counts is 45% of his final grade and a final exam that counts is 15% of his final grade his med term score is 69 his project score 67 his homework scores 82 and his final exam score of 79 what is his overall final score what letter grade did he earn ABC D or F assume that I mean of 90 or above is an H a mean of at least 80 but less than 90 is a B and so on