# 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, - 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.

#### 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 = (∑ f_ix_i)/(∑ f_i)

Mean = 147000 / 30

= 4900

So, the mean of monthly salary is Rs. 4900.

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Chapter 7: Statistics - Practice set 7.5 [Page 125]

#### 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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