The distribution below gives the weights of 30 students of a class. Find the median weight of the students.

Consider the frequency distribution table (Table 14.3, Example 4, Chapter 14), which gives the weights of 38 students of a class. (i) Find the probability that the weight of a student in the class lies in the interval 46-50 kg. (ii) Give two events in this context, one having probability 0 and the other having probability 1.

The set of weak students in a class is :

Find the equivalent weight of CaCO3

Consider the following frequency distribution table representing the weights of 40 students of a class . Draw a histogram to represent the above data.

Find the median weight for the following data:

The set of poor students in the class is :

Find the range of heights of any ten students of your class.

There are 20 students in a Chemistry class and 30 students in a Physics class. Find the number of students which are either in Physics class or Chemistry class in the following case : the classes meet at the same hour.