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 is the distribution of marks in Economics obtained by 50 students : {:("Marks (more than)",0,10,20,30,40,50),("Number of Students",50,46,40,20,10,3):} Calculate the median marks . If 60% of the students pass this test , find the minimum marks obtained by a pass candidate.

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

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):}

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):}

Following table gives marks in Statistics of the students of a class. Find out mean marks. {:("Mid-value",5,10,15,20,25,30,35,40),("Number of Students",5,7,9,10,8,6,3,2):}

Marks scored by 25 students in a class for 10 marks are 5,6,7,4,2,2,9,10,2,4,7,4,6,9,5,5,4,7,9,5,2,4,5,7.Number of students obtained the mark ‘7’ are………………………

The following table given the marks scored by 50 students in a 100 marks test of Mathematics. {:("Marks",0-20,20-40,40-60,60-80),("No of "3,12,18,10,7),("students",,,,):} A student is selected randomly from the class. Find the probability that the selected student.