The arithmetic mean of the marks obtained in 8 different subjects in a school are given below. Find the average of the sum of the marks of 8 subjects.

The marks obtained by 30 students in a examination of a class are given below . Find their average.

The marks obtained by 41 students in an examination in Math are given below: Find the average of the marks obtained by them.

The arithmetic means of the marks obtained by the students of a school in English and Bengali are 40.25 and 48.50 respectively . Find the averages of the sums of the marks obtained in English and Bengali.

The frequency distribution of the marks obtained in a school is given below. In the table, the number of students who obtained marks from 31 to 40 , is unknown . But it is known that the average of total work obtained by the students is 42.85. Find the lost frequency.

Find the mean of the marks from the frequency table.

The donations given to an orphanage home by the students of different classes of a secondary school are given below. Find the mean, median and mode of the data.

The average of weights (in kg) and the number of students of a school of given below. Find their collective average.

The frequency distribution of the number of accidents in 30 consecutive days in a city are given below. Find the arithmetic mean.

The frequency distritubution of the monthly salaries of 80 workers of a company are given below. Find the arithmetic mean of the salaries of the workers

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