Total number of boys in hostel A and that of girls in hostel C is what percent more than number of boys in hostel B?

Let number of girls in hostel B=100x Then number of boys in hostel B=200x Number of girls in hostel A= 130x Number of boys in hostel C=120+100=220 Number of girls in hostel C=1000-220=780 Total number of girls in hostel A and that of in hostel D=446 Number of girls in hostel D=(446-130x) Number of boys in hostel D=302 ATQ 200x – 302 = 98 ⇒ x = 2 /

Total number of boys in hostel A and that of girls in hostel C = 900

Required %= $frac{{900 - 400}}{{400}} imes 100 = 125{ m{\% }}$