A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent.

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

Explain the meaning of the following terms: frequency of a class

The students of a class are made to stand in rows. If 3 students are extra in a row, there would be 1 row less. If 3 students are less in a row, there would be 2 rows more. Find the number of students in the class.

There are 40 students in Class X of a school of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. She writes the name of each student on a separate card, the cards being identical. Then she puts cards in a bag and stirs them thoroughly. She then draws one card from the bag. What is the probability that the name written on the card is the name of (i) a girl? (ii) a boy?

Explain the meaning of the following terms: cumulative frequency of a class.

The following table shows the number of students in various classes in different school activities. Represent the above data by a pie chart.