Class mark of a class is obtained by using
Upper limit + lower limit
upper limit - lower limit
Class mark is the midpoint of a class interval. Therefore, its formula is given by upper limit+lower limit2.
The following table shows the marks obtained by 5 students in a class. What is the average marks of the class?
MarksFrequency981651882541
Below is the histogram depicting marks obtained by 43 students of a class. What is the class size?