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A table categorizing the workers in an office on the basis of their salary is given below.

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A table categorizing the workers in an office on the basis of their salary is given below.

Salary (Rs) Number of workers
15000 -18000 1
18000 – 21000 3
21000 – 24000 5
24000 – 27000 4
27000 – 30000 1
30000 – 33000 1

 Find the mean of salary.

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Mean income = \(\frac{349500}{15}\)

= R.s 23300

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