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Question 5
Find the mean salary of 60 workers of a factory from the following table:
Salary (in Rs)Number of workers30001640001250001060008700068000490003100001Total60

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Solution

We knowthat
Mean=f1x1f1
The value of f1x1 and f1 can be calculated asfollows
Salary (in Rs)(x1)Number of workers(f1)f1x13000163000×16=480004000124000×12=480005000105000×10=50000600086000×8=48000700067000×6=42000800048000×4=32000900039000×3=2700010000110000×1=10000 Totalf1=60f1x1=305000
Mean salary=30500060
Therefore, mean salary of 60 workers is Rs 5083.33

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