The mean marks of students of a school is 56 .The mean marks of girls is 60 and that of boys is 50 .If number of boys and girls are n and m respectively, then `(9n)/(m)` equals

70% of the students in a school are boys and the number of girls is 504 find the number of boys in the school

The mean weight of 100 students in a class is 46 kg. The mean weight of boys is 50 kg and that of girls is 40 kg. The number of boys exceeds the number of girls by

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

If 60% of students in a school are boys and the total number of girls in the school is 460, find the number of boys in the school.

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

The average marks of 50 students of a class is 76. If the average marks of all boys is 70 and that of all girls is 80 in that class, then find the number of boys in the class.