The mean marks of boys & girls in periodical test are 36 and 39 respectively. If the mean marks of all the students of class IX in that test are 37. Find the ratio of the number of boys to the number of girls.

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.

The mean marks (out of 100) of boys and girls in an examination are 70 and 73 respectively. If the mean marks of all the students in that examination is 71, find the ratio of the number of boys the number of girls.

The mean marks (out of 100) of boys and girls in an examinatin are 70 and 73, respectively. If the sum mean marks of all the students in that examination is 71, find the ratio of the number of boys to the number of girls.

In a class of 36 students, 20 are girls and the rest are boys. Find the ratio of: the number of boys to the number of girls.

The mean marks (out of 100) of boys and girls in an examination are 70 and 73, respectively. If the combined mean of marks of all the students in that examination is 71, find the ratio of the number of boys to the number of girls.

In a class of 36 students, 20 are girls and the rest are boys. Find the ratio of: the number of girls to the number of boys.

Suppose there are 32 students in a class of which 12 are girls. Find : The ratio of number of boys to the number of girls.

In a class of 36 students, 20 are girls and the rest are boys. Find the ratio of: the number of boys to the total number of students in the class.