In a group of students, the mean weight of boys is 65 kg. and mean weight of girls is 55 kg. If the mean weight of all students of group is 61kg, then the ratio of the number of boys and girls in the group is

If the mean weight of 10 students is 25 kg and the mean weight of another 10 students is 35 kg, then the mean weight of 20 students is _______.

In a class of 30 students, the average weight of boys is 20 kg and the average weight of the girls is 25 kg. The fraction of boys out of the total students of the class is :

In a class of 30 students, the average weight of boys is 20kg and the average weight of the girls is 25kg. The fraction of boys out of the total students of the class is :

The mean weight of 20 students is 25 kg and the mean weight of another 10 students in 40 kg . Find the mean weight of the 30 students .

The mean weight of 150 students in a certain class is 60 kg. The mean weight of boys is 70 kg and that of girls in the class is 55 kg. Find the number of boys and girls in the class.

The mean weight of 60 students in a class is 40 kg. The mean weight of boys is 50 kg while that of girls is 30 kg. Find the number of boys and girls in the class.

In a class of 100 students, the average weight is 30 kg. If the average weight of the girls is 24 kg and that of the boys is 32 kg, then what is the number of girls in the class ?

In a class of 25 boys and 20 girls, the mean weight of the boys is 40 kg and the mean weight of the girls is 35 kg. Find the mean weight of the class. The following are the steps involved in solving the above problem. Arrange them in sequential order. (A) The total weight of 25 boys = 25 xx 40 = 1000 kg The total weight of 20 girls =20 xx 35 = 700 kg (B) The mean weight of the class = (1700)/(45) = 37(7)/(9) kg (C) The total weight of 45 students = 1000 kg + 700 kg = 1700 kg

The mean weight of 60 students of a class is 52.75 kg. If the mean weight of 25 of them is 51 kg., find the mean weight of remaining students.