Answer:
d
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}
2(2 numebrs) / 1/3+1/5
8.1m questions
10.8m answers