Question

oumation. The frequency of class 49-52 is missing. It is known that the mean of the frequence
EXAMPLE 6 The following table gives weekly wages in rupees of workers in a certain commercia
LEVEL-2
distribution is 47.2. Find the missing frequency.
Weekly wages (1): 40 - 43
13-16
46 - 49 49 - 52
52 - 55
Number of workers
37
58
60
?
27
SOLUTION Let the missing frequency bef, the assumed mean be A = 47 and h = 3
Calculation of Mean​

Answer 1

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