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Find harmonic mean {12,17,20} [ Calculator, Method and examples ]

Solution:
Your problem -> harmonic mean {12,17,20}

Harmonic mean :
 x 1/x 12 0.0833 17 0.0588 20 0.05 --- --- sum 1/x=0.1922

HM of X = n/(sum (f/x))

=(3)/(0.1922)

=15.6122

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