Problem 5: Following is the distribution of marks out of 50 maximum marks in a class of 40 students No of i. How many students have got Groups student") marks less than 80%? ii. How many students have got marks More than 60%? iii. How many students have got marks less than 40? iv. How ma my students have got marks more than 20? v. Find median marks and discuss the class performance. vi. Find 3rd quartile of marks and discuss the class performance. vii. Find 90'\" percentile of marks and discuss the class performance. viii. Calculate SD ix. Calculate Variance x. Calculate MSD about 30