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

The following table shows frequency distribution of marks secured by 100 students in a particular examination. Find the mean of the 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) .

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 for some x in R , the frequency distribution of the marks obtained by 20 students in a test is: Then the mean of the marks is:

If for some x in R , the frequency distribution of the marks obtained by 20 students in a test is: Then the mean of the marks is:

Answer the following : Given below the frequency distribution of marks obtained by 199 students. Compute arithmetic mean and S.D.

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).

The step frequency distribution table of the marks obtained by female students is given below. Calculate the mean marks.