Find the about the mean for the following data:
Marks obtained , 10-20, 20-30, 30-40, 40-50, 50-60, 60-70, 70-80
Number of students, 2, 3, 8, 14, 8, 3, 2

Obtain the mean , median and mode of the following data : {:("Marks",0-10,10-20,20-30,30-40,40-50,50-60,60-70,70-80),("Number of Students"," "5," "7," "15," "25," "20," "15," "8," "5):}

Find the mean deviation about median for the following data : Marks 0-10 10-20 20-30 30-40 40-50 50-60 Number of 6 8 14 16 4 2 Girls

Caculate the median and mode from the following data : {:("Marks",0-10,10-20,20-30,30-40,40-50,50-60,60-70,70-80),("Number of Students"," "2," "18," "30," "45," "35," "20," "6," "3):}

Find the mean deviation from the mean of the following data: Classes:,10-20,20-30,30-4040-50,50-60,60-70,70-80 frequency,2,3,8,14,8,3,2

Find out median , with the help of the following data : {:("Price Level",10-20,20-30,30-40,40-50,50-60,60-70),("Number of Commodity"," "2," "5," "8," "4," "6," "3):}

Calculate mean from the following data: {:("Marks",10-20,10-30,10-40,10-50,10-60,10-70,10-80,10-90),("Number of Students"," "4," "16," "56," "97," "124," "137," "146," "150):}

Calculate the median deviation from the median of the following data: Wages per week (in Rs.),10-20,20-30,30-40,40-50,50-60,60-70,70-80 No.of workers,4,6,10,20,10,6,4

Find the median of the following data: {:("Class Interval",0-10,10-20,20-30,30-40,40-50),(f,6,8,5,4,7):}

The following table gives the marks scored by 100 students in an entrance examination. Marks:, 0-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-70, 70-80 No. of Students (Frequency):, 4, 10, 16, 22, 20, 18, 8, 2