36 Math Functions
=
Σx
n
(12)(1)+ (13)(0.5)+ (10)(1)+ (11)(0.5)
1 + 0.5 + 1 + 0.5
3. The teacher gave Anthony 4 more points on test 4 due to a grading error. Find
Anthony’s new average grade.
v v $ $ $
<
v " $ $ $ $
<
12 $ 13 $ 10 $ 11 $
" 1 $ .5 $ 1 $ .5
<
% u
2
$ " " <
<
Anthony has an average (v) of 11.33 (to the nearest hundredth).
On the calculator, n represents the total sum of the weights.
n = 1 + 0.5 + 1 + 0.5.
Gx represents the weighted sum of his scores.
(12)(1) + (13)(0.5) + (10)(1) + (11)(0.5) = 34.
Change Anthony’s last score from 11 to 15.
v $ $ $ 15 <
% u 2
$ " " < <
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