Let, the number of students in rooms A and B be x and y respectively Then, x - 10 = y + 10 =x - y = 20 ..............(1) and x+20=2(y-20) =x - 2y =-60.......(ii) Solving (i) and (ii) we get: x = 100 v = 80. ans: The number of students in room A = 100
You need to log in to continue.
You need to download the app to make a call.