Answer:
14.54
Step-by-step explanation:
In a weighted average a “weight” is associated to each value.
The weighted mean is computed the following way:
Suppose you want to calculate the weighted mean of the values
a1, a1, …, an
with weights
w1, w2,..., wn
Then
Weighted mean =(w1*a1+w2*a2+... +wn*an)/(w1+w2+...+wn)
In this case we have
a1= 12, w1 = 8
a2 = 13, w2 = 6
a3 = 17, w3 = 12
Weighted mean
(12*8+13*6+17*12)/(8+6+12) = 14.54 rounded to 2 decimal places.
