The marks of maximum number of students fall in the range of __________.
20-30
40-50
80-90
90-100
The class interval 80-90 has the maximum number of students
The marks obtained by 40 students of a class are given below : 80,10,30,70,60,50,50,40,40,20,40,90,50,30,70,10,60,50,20,70,70,30,80,40,20,80,90,50,80,60,70,40,50,60,90,60,40,40,60, and 60
The table given below shows the marks obtained by 140 students of a class in a test with maximum marks 100.
A student of the class is selected at random. Find the probability that this student gets