The following data relate to the pay of workers employed at a factory and the

average number of hours worked per week for June and November.
Type of worker Rate of pay June November Number of workers
Skilled K6.5 37 38.5 26
Semi-skilled K5.1 38.5 39.5 14
Unskilled K3.5 40.5 40 42
Required: Calculate a weighted aggregate index of average weekly pay for November
(June = 100), using the number of workers employed as a weighting factor.