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Find the Mean Salary of 60 Workers of a Factory from the Following Table - CBSE Class 9 - Mathematics

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Question

Find the mean salary of 60 workers of a factory from the following table:-

Salary (in Rs) Number of workers
3000 16
4000 12
5000 10
6000 8
7000 6
8000 4
9000 3
10000 1
Total 60

Solution

We know that

`"Mean "=(sumf_ix_i)/(sumf_i)`

`"The value of "sumf_ix_i" and "sumf_i" can be calculated as follows."`

Salary (in Rs) (xi) Number of workers (fi) fixi
3000 16 3000 × 16 = 48000
4000 12 4000 × 12 = 48000
5000 10 5000 × 10 = 50000
6000 8 6000 × 8 = 48000
7000 6 7000 × 6 = 42000
8000 4 8000 × 4 = 32000
9000 3 9000 × 3 = 27000
10000 1 10000 × 1 = 10000
Total sumf_i=60 sumf_ix_i=305000

`"Mean salary "=305000/60=5083.33`

Therefore, mean salary of 60 workers is Rs 5083.33.

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APPEARS IN

 NCERT Solution for Mathematics Class 9 (2018 to Current)
Chapter 14: Statistics
Ex. 14.40 | Q: 5 | Page no. 269

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Solution Find the Mean Salary of 60 Workers of a Factory from the Following Table Concept: Measures of Central Tendency.
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