a hostel had 320 inmates. this year 80 more inmates joined and the average expenditure reduced by 5 but the total expenditure went up by 400. what is the expenditure of the hostel in this year?

• Let avg expenditure=X
  Total expenditure=320x
  Now new expenditure=(x-5)
  Total expenditure =(x-5) X 400
  ATP,
  400X- 2000-320x=400
  x=30
  Total expenditure =10000
• 7 years agoHelpfull: Yes(24) No(6)
• Ans: 10,000
  Let the previous average is x
  The number of inmates are 320
  Therefore Previous total expenditure= 320x
  
  Now there are 400 inmates.
  The average is reduced by 5, i.e (x-5)
  total expenditure now = 400(x-5)
  
  The total expenditure has went up by 400.
  Therefore 400(x-5) - 320x = 400
  --> 80x = 2400 ---> x=30
  Therefore the expenditure this year is 400(30-5)= 400*25 = 10,000
• 7 years agoHelpfull: Yes(16) No(3)
• Do the same questions will repeat in further papers?
• 7 years agoHelpfull: Yes(7) No(2)
• Let the expenditure be Rs.x
  total expenditure=(320x)
  expenditure reduced by 5=(x-5)
  then,
  400(x - 5) - 320x = 400
  ⇒ x = 30
  Therefore original expenditure = Rs.(400 × 30)=Rs.12000
• 7 years agoHelpfull: Yes(5) No(20)
• Initially, let the avg expenditure be : x
  Initially total no of inmates : 320
  then, Total Expenditure : 320x
  
  similarly,
  when this year 80 more inmates joined and
  avg expenediture is reduced by 5, then total expenditures this year : (320 +80 )*(5-x) = 400 *(5-x)
  
  
  a/q
  
  400*(5-x) - 320x : 400
  calculate the value of x,
  we get
  
  x = 30
  and hence, expenditure of hostel in this year is = 400(30-5) = 10,000
• 7 years agoHelpfull: Yes(4) No(2)
• initial expenditure=320x
  final expenditure=400(x-5)
  
  initial-final=400
  x=30
  so this year expenditure=400(30-5)=100000
• 7 years agoHelpfull: Yes(1) No(1)
• (400*5+400)/80=30
  (30-5)*400=10000
• 7 years agoHelpfull: Yes(1) No(0)