Calculate mean
Marks 0-9 10-19 20-29 30-39 40-49 50-59
no. of students 3 8 14 21 9 5

Find the mean deviation about arithmetic mean of the following frequency distribution.Marks 0-10,10-20,20-30,30-40,40-50 No.of Students 5,8,15,16,6

Find the mode of the following distribution of marks obtained by 80 students: Marks obtained 0-10 10-20 20-30 30-40 40-50 No. of students 6 10 12 32 20

Caculate mode of the following distribution : {:("Marks",10-19,20-29,30-39,40-49,50-59,60-69,70-79,80-89,90-99),("Number of Students"," "29," "87," "181," "247," "263," "133," "40," "9," "2):}

Find out median marks from the following data : {:("Marks",0-10,10-20,20-30,30-40,40-50),("Number of Students"," "8," "30," "40," "12," "10):}

Find the mean from the following frequency distribution of marks at a test in statistics: Marks (x) : 5 10 15 20 25 30 35 40 45 50 No. of students (f) : 15 50 80 76 72 45 39 9 8 6

Locate the median graphically from the following data : {:("Marks",0-10,10-20,20-30,30-40,40-50),("Number of Students"," "10," " 20," " 30," " 20," " 10):}

Following table shows the marks scored by a group of 90 students in a mathematics test of 100 marks. Marks 0-20 20-30 30-40 40-50 50-60 60-70 70-100 No. of Students: 7 10 10 20 20 15 8 Find the probability that marks scored by a student in the class is: at most 60 marks (ii) at least 60 marks (iii)not more than 50 marks

Distribution of marks obtained by 100 student of a class is given below . Find out the median marks {:("Marks",0,5,10,15,20,25,30,35,40,45),("Number of Students",4,6,15,5,8,12,28,14,3,5):}

The following table shows wages of the workers. Calculate the average wage of the workers. {:("Wages(Rs.)",10-19,20-29,30-39,40-49,50-59),("Number of Workers"," "8," "9," "12," "11," "6):}