If x1,x2,x3,.... are n values of the variable x, then mathematical averages, Arithmetic Mean (A.M.), Geometric Mean (G.M) and Harmonic Mean (H.M) are count by the following formulas's.
A.M.=x1+x2+x3+...+xnn=1n{n∑i=1x1}≮x1>0
G.M.=(x1⋅x2...xn)1/n if each x1(i=1,2,....,n) is positive and
H.M=n1x1+1x2+...+1xn=11n∑ni=1(1x1)
* In case of frequency distribution x/f1(i=1,2,...,n) where f1 is the frequency of the variable xr then the calculation of A.M.is counted as A.M=n∑i=1f1x1/NwhereN=f1+f2....+fn
** If w1,w2,....,wn be the weight assigned to the n values
x1,x2,....,xn then weighted A.M is counted by ∑ni=1w1x1∑ni=1w1
*** if G1,G2 are the G. M's of two series of sizes n1 & n2 respectively, then the geometric mean (G M.) of the combined series is counted by log(G.M)=n1logG1+n2logG2n1+n2
On the basis of above information answer the following questions,
The mean of the divisors of 360 which are odd is
If x1,x2,x3,.... are n values of the variable x, then mathematical averages, Arithmetic Mean (A.M.), Geometric Mean (G.M) and Harmonic Mean (H.M) are count by the following formulas's.
A.M.=x1+x2+x3+...+xnn=1n{n∑i=1x1}≮x1>0
G.M.=(x1⋅x2...xn)1/n if each x1(i=1,2,....,n) is positive and
H.M=n1x1+1x2+...+1xn=11n∑ni=1(1x1)
* In case of frequency distribution x/f1(i=1,2,...,n) where f1 is the frequency of the variable xr then the calculation of A.M.is counted as A.M=n∑i=1f1x1/NwhereN=f1+f2....+fn
** If w1,w2,....,wn be the weight assigned to the n values
x1,x2,....,xn then weighted A.M is counted by ∑ni=1w1x1∑ni=1w1
*** if G1,G2 are the G. M's of two series of sizes n1 & n2 respectively, then the geometric mean (G M.) of the combined series is counted by log(G.M)=n1logG1+n2logG2n1+n2
On the basis of above information answer the following questions,
The correct option is C 13
360=23×32×5
Number of odd divisors =(2+1)(1+1)=6
And sum of odd divisors =33−13−1×52−15−1=13×6=78
Hence required mean =786=13
360=23×32×5
Number of odd divisors =(2+1)(1+1)=6
And sum of odd divisors =33−13−1×52−15−1=13×6=78
Hence required mean =786=13
