Education and Career Forum

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

Originally Posted by Unregistered

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

The Basic way to solve this Problems is by using the Formulae defined for the problem. There are many formulae and you need to understand them and then apply them for the problems so that it will be solved. Without Formulae you cannot do any problem and there are certain shortcuts for problems by which solution can be met. The most needed thing to be done for any problem is to completely analyze the problem and know what is the problem about and what is needed to be done.