A class teacher has the following attendance record of 40 students of a class for the whole term. Find the mean number of days a student was present out of 56 days in the term.

A class teacher has the following attendance record of 40 students of a class of for the whole term . Find the mean number of days a student was present out of 56 days in the term . {:("Number of days","Number of students"),(35-38,1),(38-41,3),(41-44,4),(44-47,4),(47-50,7),(50-53,10),(53-56,11):}

The distribution below gives the weights of 40 students of a class. Find the median weight of the students.

Out of 96 students 12 students were absent in a class.Then the percentage of students are present?

Suppose there are 32 students in a class of which 12 are girls. Find : The ratio of number of boys to total number of students.

Suppose there are 32 students in a class of which 12 are girls. Find : The ratio of number of boys to the number of girls.

There are 40 students in a class. Their average mark in English is 55. The mean of 10 girl students is 58. Find the mean of the boy students in the class.

Suppose there are 32 students in a class of which 12 are girls. Find : The ratio of number of girls to total number of students.

In a class of 48 students the number of girls is one third the number of boys.Find the number of girls and boys 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 cards, the cards being identical . Then she puts cards in a box and stirs them throughly. She then draws one card from the box.What is the probability that the name written on the card is the name of a boy?

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 cards, the cards being identical . Then she puts cards in a box and stirs them thoroughly. She then draws one card from the box.What is the probability that the name written on the card is the name of a girl