79
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79+82+93+91+100=445/5=89
The average of 79, 84, 82, and 87 is 83.
79.
If final is 25% of grade and your average was 82 before final that part is 75%. So we have (.75(82) + .25 (73)) = 80
82 multiplied by 79 is 6,478.