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Ex 14.4, 5 - Chapter 14 Class 9 Statistics (Term 1)

Last updated at Sept. 22, 2018 by

Ex 14.4, 5 - Find mean salary of 60 workers of a factory - Ex 14.4

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Ex 14.4, 5 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 3000 Γ— 16 = 48000 4000 Γ— 12 = 48000 5000 Γ— 10 = 50000 6000 Γ— 8 = 48000 7000 Γ— 6 = 42000 8000 Γ— 4 = 32000 9000 Γ— 3 = 27000 10000 Γ— 1 = 10000 βˆ‘β–’π‘“iπ‘₯i = 305000 Mean(π‘₯ Μ…) = (βˆ‘β–’π‘“π‘–π‘₯𝑖 " " )/(βˆ‘β–’π‘“π‘– " " ) "= " 305000/60 = 5083.33

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