Mean weight of 30 boys in a class is 60 kg and that of 20 girls is 45 kg. Find the mean weight of all the 50 students.

There are 50 students in a class, of which 40 are boys. The average weight of the class is 44 kg and that of girls is 40 kg. find the average weight of the boys.

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

Find the mean of all possible factors of 20.

A class consists of 50 students out of which 30 are girls, the mean of mark scored by girls in a test is 45 and that of boys is 30. determine the mean score of the whole class.

Rahul bought 4 kg 90 g apples,2 kg 60 g of grapes and 5 kg 300 g mangoes.Find the total weight of all the fruits he bought.

Rahul bought 4 kg 90 g of Apples , 2 kg 60 g of grapes and 5 kg 300 g of mangoes . Find the total weight of all fruit he bought

The mean marks of boys and girls in an examination are 70 and 73, respectively. If the mean marks of all the studetns in that examinatin is 71, find the ratio of the number of boys to the number of girls.

There are 20 girls and 15 boys in a class. What is the ratio of number of girls to the total number of students in the class?