A student's course grade is based on one midterm that counts as 20% of his final grade one class project that counts as 15% of his final grade, a set of homework assignments that counts as 30% of his final grade,and a final exam that counts as 35% of his final grade. His midterm score is 69 his project score is 92, his homework score is 78, and his final exam score is 68 What is his overall final score? What letter grade did he earn (A, B, C, D, or F)?Assume that a mean of 90 or above is an A. a mean of at least 80 but less than 90 is a B, and so on. His overall final score is square (Type an integer or a decimal. Do not round.)

To find the student's overall final score, we need to calculate the weighted average of his scores in each component of the course.<br /><br />The midterm score is 69, and it counts as 20% of the final grade. So, the weighted midterm score is 69 * 0.20 = 13.8.<br /><br />The project score is 92, and it counts as 15% of the final grade. So, the weighted project score is 92 * 0.15 = 13.8.<br /><br />The homework score is 78, and it counts as 30% of the final grade. So, the weighted homework score is 78 * 0.30 = 23.4.<br /><br />The final exam score is 68, and it counts as 35% of the final grade. So, the weighted final exam score is 68 * 0.35 = 23.8.<br /><br />Now, we add up all the weighted scores to get the overall final score:<br />Overall final score = 13.8 + 13.8 + 23.4 + 23.8 = 74.8.<br /><br />Therefore, the student's overall final score is 74.8.<br /><br />To determine the letter grade, we compare the overall final score to the grading scale:<br />- A: 90 or above<br />- B: 80 to 89<br />- C: 70 to 79<br />- D: 60 to 69<br />- F: Below 60<br /><br />Since the student's overall final score is 74.8, which falls within the range of 70 to 79, the student earned a letter grade of C.