Weighted Average from End of Semester

35 students completed the course (20 in CS428, 15 in CS828)

Instrument Ratings Average Respondents
5 4 3 2 1
My Instrument 49%28%16%6%0% 4.67 out of 5 (or 0.934)33
Faculty of Science Instrument 21%72%6%0% 3.15 out of 4 (or 0.787)6

The weighted average is calculated as (0.787 * 6) + (0.934 * 33) = 35.54 / (33 + 6) = 91%