(i) `-120+10+(-20)` (ii)`-20-30`

Replace * by in each of the following to make the statements true: (i) (-20)-(-20)* 20-(65) (ii) 28-(-10)*(-16)-(-76)

The median of the following frequency distribution is {:("Class interval",f),(" "0-10,5),(" "10-20,8),(" "20-30,7),(" "30-40,10),(" "40-50,20):}

Find the coefficient of variation for the following data: Size (in cms) 10-15 15-20 20-25 25-30 30-35 35-40 No. of items 2 8 20 35 20 15

Draw histograms for the following frequency distributions : {:("Class interval ", 0-10, 10-20, 20-30, 30-40, 40-50, 50-60),("Frequency "," "12, " " 20, " " 26, " " 18, " " 10, " " 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

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

Find the median of the following data. {:("Class Interval",f),(" "0-10,12),(" "10-20,13),(" "20-30,25),(" "30-40,20),(" "40-50,10):}

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

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

Find the mean of the following frequency distribution: Class-interval: 0-10 10-20 20-30 30-40 40-50 No. of workers f: 7 10 15 8 10