The average of the weights of 150 students is 50 kilogram. The average of the weights of the boy students is 55 kilograms and the average of the weigths of the girls students is 42.5 kilogram . Find the number of boy and girl students.

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 average weight of the following frequency distribution is 58.5 kilogram : Find the value of x .

Find the average height of the students from the given table.

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

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.

The mean weight of 150 students of a class is 38 kg. If mean weight of the boys and the girls are 40 kg and 35 kg respectively, find the number of boys and girls.

The frequency distribution of the heights (in cm) of 100 students of class X in a school .Find the average height of the students .

The mean (average) weight of three students is 40 kg. One of the students Ranga weighs 46 kg. The other two students, Rahim and Reshma have the same weight. Find Rahims weight.

The mean weight per student in a group of 7 students is 55 kg. The individual weights of 6 of them (in kg) are 52, 54,55, 53, 56 and 54. Find the weight of the seventh student.

Weight of 5 students is given as 54,44,47,65 and 51. Find the mean of the following weight