harmonic mean of 6, 3, 15 and 10
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karna kya samajh nhi aaya
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The harmonic mean is a type of numerical average. It is calculated by dividing the number of observations by the reciprocal of each number in the series. Thus, the harmonicmean is the reciprocal of the arithmetic mean of the reciprocals. The reciprocal of a number n is simply 1 / n.
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