Statistics Example

Problem: The marks of 5 students are: 60, 70, 80, 90, 100. Find the mean.

Solution: Mean=Sum of marksNumber of students\text{Mean} = \frac{\text{Sum of marks}}{\text{Number of students}}Mean=Number of studentsSum of marks​ =60+70+80+90+1005=4005=80= \frac{60+70+80+90+100}{5} = \frac{400}{5} = 80=560+70+80+90+100​=5400​=80

Mean = 80