While calculating mean the following enteries were found `sum fx=600. sumf=50`. Find the mean.

While calculating the mean of a given data by the assumed-mean method, the following values were obtained: A=25. Sigmaf_1d_1=110,Sigmaf_1=50 Find the mean.

Calculate mean deviation from mean of the following series:

Find the mean barX in the following cases: sumf_ix_i=100 and sumf_i=20

Find bar d in the following cases: sumf_id_i=80 , sumf_i=50 .

Find bar u in the following cases: sumf_iu_i=-5, sumf_i=50

Find the mean barX in the following cases: sumf_ix_i=75 and sumf_i=15

Find the mean barX in the following cases: sumf_ix_i=3880 and sumf_i=100 .

Find sumf_iu_i in the following cases : baru= -0.5,sumf_i= 50