Maharashtra State BoardSSC (English Medium) 9th Standard
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The Monthly Salaries in Rupees of 30 Workers in a Factory Are Given Below. - Algebra

Sum
The monthly salaries in rupees of 30 workers in a factory are given below.
5000, 7000, 3000, 4000, 4000, 3000, 3000, 3000, 8000, 4000, 
4000, 9000, 3000, 5000, 5000, 4000, 4000, 3000, 5000, 5000, 
6000, 8000, 3000, 3000, 6000, 7000, 7000, 6000, 6000, 4000
From the above data find the mean of monthly salary.
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Solution

The monthly salaries in rupees of 30 workers in a factory are given below:
5000, 7000, 3000, 4000, 4000, 3000, 3000, 3000, 8000, 4000, 
4000, 9000, 3000, 5000, 5000, 4000, 4000, 3000, 5000, 5000, 
6000, 8000, 3000, 3000, 6000, 7000, 7000, 6000, 6000, 4000
 
The frequency table of the above data is as follows:
 
Salaries (Rs.) (xi) Number of workers (fi) fixi
3000 8 24000
4000 7 28000
5000 5 25000
6000 4 24000
7000 3 21000
8000 2 16000
9000 1 9000
  Total N= 30

Total = 147000

Mean = `147000 / 30` = 4900
So,the mean of monthly salary is Rs. 4900.
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APPEARS IN

Balbharati Mathematics 1 Algebra 9th Standard Maharashtra State Board
Chapter 7 Statistics
Practice set 7.5 | Q 4 | Page 125
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