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):}`

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):}

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):}

Caculate mode of the following data : {:("Marks",0-5,5-10,10-20,20-40,40-60,60-80,80-90,90-100),("Number of Students"," "5," "7," "9," "25" "," "30," "24," "8," "6):}

Calculate mode of the following sercies: {:("Class Interval",10-19,20-29,30-39,40-49,50-59,60-69,70-79),("Frequency"," "10," "12," "18," "30," "16," "6," "8):}

Compute D3 for the following distribution : {:("Marks",0-10,10-20,20-30,30-40,40-50,50-60,60-70,70-80,),("No.of students",3,10,17,7,6,4,2,1,):}

Find the missing frequency in the following distribution if N=100 and M=30. {:("Marks",0-10,10-20,20-30,30-40,40-50,50-60),("Number of Students"," "10," "?," "25," "30," "?," "10):}

Construct a frequency polygon for the following distribution, using a graph sheet : {:("Marks",30-40,40-50,50-60,60-70,70-80,80-90),("No. of students"," "6," "15," "28," "34," "18," "8):}

Compute the missing frequencies in the following distribution , given that is sum f_(i) = 100 and the median is 32 {:("Marks",0-10,10-20,20-30,30-40,40-50,50-60),("Number of students "," "9," "?, " "26, " "30, " " ?, " "10):}

The following table gives distributionn of marks secured by some stidents : {:("Wege Rate (Rs.)",10-20,20-30,30-40,40-50,50-60,60-70,70-80),("Number of Students"," "42," "38," "120," "84," "48," "36," "31):} Calculate the median marks secured by the students.

The modal class for the following frequency distribution, is {:("Marks:", 0-10,10-20,20-40,40-50,50-60,60-70,70-90,90-100),("No. of students:",4,6,14,16,14,8,16,5):}