Period 1 has 15 students in it and a test average of 86%. Period 2 has 21 students in it and an average of 88%. Period 3 has 12 students in it and an average of 95%. Use weighted means to find the overall average of the classes.

Question

anonymous · Answer

I just want the answer lol

anonymous · Answer

well, 
Period -1 of 15 students with 86% = 12.9
Period -1 of 21 students with 88% = 18.48
Period -1 of 12 students with 95% = 11.4

so for all students of 48 it is = 42.78 = 89.125%

Hope its right... :P