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OpenStudy (anonymous):
harmonic means of 2,0,9 is plz slove this
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Directrix (directrix):
Harmonic Mean is the reciprocal of the arithmetic mean of the reciprocals. In other words the number of observations, divided by the sum of reciprocals of the observations. This is also is one of several kinds of average and it is appropriate for situations when the average of rates is desired
Directrix (directrix):
Sorry, my machine froze. Starting the harmonic mean calculation: 3/ [1/2+ 1/0 +1/9] immediately presents a problem because the expression 1/0 does not exist.
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