Some Other Useful Results Of Arithmetic Mean –
Let, the mean of x₁, x₂, x₃,……………….., xₑ be ‘A’. then
(i) Mean of (x₁ + k), (x₂ + k), (x₃ + k),……………….,(xₑ + k) is (A + k)
(ii) Mean of (x₁ - k), (x₂ - k), (x₃ - k),……………….,(xₑ - k) is (A - k)
(iii) Mean of kx₁ + kx₂ + kx₃+ ……………………kxₑ is kA, where k ≠ 0
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