Question

one third of the boys and one half of the girls of a college participate in its social work project. if the number of participating students is 300, out of which 100 are Boyd, what is the total number of students in the college

Answer 1

Let total students be x
According to Question:
1/3x+1/2x=300
2+3/6x=300
5/6x=300
x=300*6/5
x=360
boys = 1/3x
1/3*360
=120
girls=1/2x
1/2*360
=180
total=360