In a class there are two sections A and B. If 10 students of section B shift over to section A, the strength of A becomes three times the strength of B. But if 10 students shift over from A to B, both A and B become equal in strength. How many students are there in sections A and B?

• Let x nd y be the no. of students in section A nd B initially
  x+10 = 3(y-10)
  x=3y-30-10
  x=3y-40 -->(1)
  
  (x-10) = y+10
  x=y+20 -->(2)
  
  Equate "x"
  3y-40 = y+20
  2y=60
  y=30
  x = 50
  
  A = 50, B = 30
  
  
• 10 years agoHelpfull: Yes(11) No(0)
• Assume there are x student in A & y students in B. From condition we get
  X+10=3(y-10).
  Or, x-3y= -40...(1)
  And x-10=y+10.
  Or, x-y=20....(2)
  Solving (1)&(2) we get x=50, y=30.
• 8 years agoHelpfull: Yes(0) No(0)