0.23 parts of students of our class are girls. Let's find the percentage of girl students out of all the student of our class.

(ii) Today, 7 students of our class are absents. There are 35 students in our class. Let us find the percentage of students persent today in class.

30 students of my class were present. Total number of students in our class is 60. Let's find what percent of students have come to my class.

Two thirds of eth students in a class are boys and the rest girls. It is known that eh probability of a girl getting a first class is 0.25 and that of a boy getting a first class is 0.28. find the probability that a student chosen at random will get first class marks in the subject.

On the occasion of Dipawali festival each student of a class sends greeting cards to others. If there are 20 students in the class, the number of cards sends by students is

The average of the collective ages of 4 classes in a school is 8.5 years. The number of students of 4 classes are 32.30, 29 and 27. If the average of the classes of the first, second and third be 6.8 years, 7.5 years and 8.2 years respectively , then find the average of ages of the students of class-IV.

There are 25 boy students and 20 girls students in a school. The average of marks in math of 25 boy students is 52 and the average of marks in math of 20 girl-students is 48. Find the average of marks obtained by the students of the school as a whole.

An educational trip to Gadiyara had been arranged by our school for collection environment related date. 32 studens of class six, 36 students of class seven and 28 students of class eight are going for the trip, few small school buses have been arranged so that each bus must accoumodate equal number of studentsfrom the three classes. Let us find ,total number of buses required and number of students each but will accomodate.

On the occasion of deepawali festival each student of a class sends greetings cards to one another if the postman deliver 1640 greeting cards to the students of this class then the number of students in the class is

Let X = {Ram, Geeta, Akbar} be the set of students of Class XI, who are in school hockey team. Let Y = {Geeta, David, Ashok} be the set of students from Class XI who are in the school football team. Find X ∪ Y and interpret the set.