Final answer:
The student's weighted mean grade point score is 2.6.
Step-by-step explanation:
The student's weighted mean grade point score can be calculated by multiplying each grade by its corresponding point value, summing up these values, and dividing by the total number of grades. In this case, the student's grades are A, B, C, and D with corresponding point values of 4, 3, 2, and 1, respectively:
(4 * 4 + 3 * 3 + 2 * 2 + 1 * 1) / (4 + 3 + 2 + 1) = 2.6
Therefore, the student's weighted mean grade point score is 2.6.