A company tracked the number of complaints it received during the first 6 months of last year, as shown in the following table:
|
Month
|
Complaints
|
Weights
|
|
January
|
36
|
0.1
|
|
February
|
45
|
0.1
|
|
March
|
81
|
0.3
|
|
April
|
90
|
0.3
|
|
May
|
95
|
0.1
|
|
June
|
92
|
0.1
|
What was the 3-month double moving average in July?
a. 72
b. 85
c. 89
d. 92