Question

in a class the number of boys is 1.5 times the number of girls and the average marks of boys is 90% of the average marks of the girls the combined average of boys and girls is 56.4 find the average marks of boys and average marks of girls​

Answer 1

Answer:

Step-by-step explanation:

Let the number of boys and girls be x and y

∴52x+42y=50(x+y)

52x+42y=50x+50y

52x−50x=50y−42y

2x=8y

x=4y

Total number of students in the class = x+y

=4y+y

=5y

Percentage of boys = 4/y/5/y×/10020

=80