Question

the harmonic mean of 2, 3, 5, 7 is

Answer 1

Harmonic Mean. A kind of average. To find the harmonic mean of a set of n numbers, add the reciprocals of the numbers in the set, divide the sum by n, then take the reciprocal of the result. The harmonic mean of {a1, a2, a3, a4, . . ., an}