* The student scored 83% on the first test
* The student scored 77% on the second test
* The final exam is worth twice as much as each test
* The student scored 70% on the final exam
* To calculate the overall grade:
* - First test grade (83%) * 1 test weight
* - Second test grade (77%) * 1 test weight
* - Final exam grade (70%) * 2 test weights (since it's worth twice as much)
* - Add these weighted grades
* - Divide by total weights (1 + 1 + 2 = 4)
* Calculation:
* (83% * 1) + (77% * 1) + (70% * 2) = 83% + 77% + 140% = 300%
* 300% / 4 weights = 75%
* Therefore, the student's overall grade is 75% (rounded to the nearest whole number).