Ages of some students are (in years) 10, 11, 9, 7, 13, 8, 14 the median of the ages of those students is _________ years.

The number of students in a class is 60 . The average of the ages of the boy-students is 14.5 years and the average of the ages of the girl-students is 16 years . If the collective average of the total students be 15 years , then find the number of boy-students and the number of girl-students.

The median of 10, 14, 11, 9, 8, 12, 6, is

If the age of some students are 6,10,5,4,9,11,20,18 years, then their mean age is

At the present the sum of the number of students in All M.S.K in a district is 3993. if the number of students increased in a year was 10% of its previous year, calculate the sum of the number of students 3 years before in all the M.S.K in the district.

If the median of 20, 19, 7, 9, 17, 16, 11, x, 13 is 15 then the value of x is

At present the sum of the number of students in all the secondary institutions in a district is 3993. If the number of students increased in a year was 10% of that in the previous year, then find the sum of the number of students in all the secondary institutions in the districts 3 years before?

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.

As a result of sarba Siksha Abhiyan, the students leaving the school before completion, the students are readmitted, so the students in a year is increased by 5% in comparison to its previous year. If the number of such readmitted students in a district be 3,528 in the present year, then find the number of students readmitted 2 year before in this manner.

The age of my father is 48 years, age of my mother is 42 years, age of my elder brother is 15 years and my age is 12 years. Hence, the ratio of the ages of my father, mother, brother and myself is 48 : 42 : 15 : 12 i.e. square:square:square:square