In details

Averages Exercises


1) Calculate the simple arithmetic mean in each of the following cases:

a) 15; 48; 36

b) 80; 71; 95; 100

c) 59; 84; 37; 62; 10

d) 1; 2 ; 3; 4; 5; 6; 7; 8; 9th

e) 18; 25; 32

f) 91; 37; 84; 62; 50

2) John wants to average the grades he took for each of the following four subjects. Calculate the weighted average of your grades, with the first two tests worth 2 points and the other two worth 3 points:

English
1st test 6,5
2nd test 7,8
3rd test 8,0
4th test 7,1

Portuguese
1st test 7,5
2nd test 6,9
3rd test 7,0
4th test 8,2

History
1st test 5,4
2nd test 8,3
3rd test 7,9
4th test 7,0

Mathematics
1st test 8,5
2nd test 9,2
3rd test 9,6
4th test 10,0