For the frequency distribution of time ( in minutes ) a worker takes to complete the work, `sumf_(i)=100,sumf_(i)d_(i)=185` and mean `(bar(X))=38.85` Find the assumed mean (A).

If sumf_(i)x_(i)=3880 and mean (bar(X))=38.8, find sumf_(i)

For the frequency distribution of marks scored by student, A=57,sumf_(i)=80andsumf_(i)d_(i)=240 . Find mean marks.

For a certain frequency distribution, the value of Assumed mean (A)=1300 , sumf_(i)d_(i)=900 and sumf_(i)=100 . Find the value of mean (barX) .

For a certain frequency distribution, the value of Assumed mean (A)=1300 , sumf_(i)d_(i)=900 and sumf_(i)=100 . Find the value of mean (barX) .

The following table shows the frequency distribution of the time required for each worker to complete a work. From the table find the mean time required to complete the job for a worker.

The following table shows the frequency distribution of the time required for each worker to complete a work. From the table find the mean time required to complete the job for a worker.

In a frequency distribution , if a =assumed mean = 55 , sumf_(i) = 100 , h = 10 and sumf_(i)mu_(i)= -30 , then find the mean of the distribution.

If the mean of a frequency distribution is 8.1 and sumf_ix_i =132 + 5 K, sumf_i = 20 then K =

For a given frequency distribution, n = 20 and sumf_i x_i = 140, then barx = ..........

In the frequency distribution, if Sigmaf_(i) =75 and Sigmaf_(i)x_(i)=6225 , the mean of the distribution is