Following are the marks of 37 students:
`{:("Marks",4,6,8,10,12,14),("No. of Students",5,7,6,8,6,5):}`
Calculate mean marks, using Short-cut Method.

The mode of the distribution : {:("Marks",4,5,6,7,8),("No. of students",6,7,10,8,3):} is :

The following table shows marks secured by the students of a class in an examination in English: {:("Marks",0-10,10-20,20-30,30-40,40-50),("Number of Students"," "20," "24," "40," "36," "20):} Calculte mean marks using Short-cut Method.

Marks secured by 42 students in economics are: {:("Marks",15,20,22,23,27,35,18),("Number of Students",8,4,7,3,8,7,5):} Find average marks.

Following are the marks obtained by 25 students in economics. Find out the mean marks by using Direct and Short-cut Method. {:("Marks",10,20,30,40,50,60),("Number of Students",5,2,3,8,4,3):}

The marks (out of 10) obtained by 35 students of a class are given in the following table : {:("Marks obtained",7,1,10,2,8,6,4,5,9,3,),("Number of students",7,0,2,0,1,9,6,4,5,1,):} Find the mean and the median. Using empirical formula, calculate its mode.

Mode of the distribution: Marks 4,5,6,7,8 No.of students 3,5,10,6,1.

The given below shows the marks obtained by various students. {:("Marks",,"Number of students"),(10-12,,6),(12-14,,8),(14-16,,5),(16-18,,7),(18-20,,4):} What is the mean marks (Correct up to two decimal places) of given data ?