In a boat 25 persons were sitting. Their average weight increased one kilogram when One man goes and a new man comes in. The weight of the new man is 70kgs. Find the Weight of the man who is going.

• If earlier average wt was x and y was wt of person who left the boat.
  
  Then
  25*x -y +70 = 25*(x+1)= 25x +25
  y = 70-25 = 45 kg.
  Weight of the man who is going is 45 kg.
• 13 years agoHelpfull: Yes(2) No(0)
• General formula:
  vaiue of added quantity = (change in avg *avg nos) +value of removed quantity
  
  70= ( 1*25) +?
  
  ans : 45 kg.
• 7 years agoHelpfull: Yes(2) No(0)
• difff in age of new and old man=25*1
  since avg incresse on coming new man
  | X-70|=25
  70-X=25
  X=45
  
• 8 years agoHelpfull: Yes(0) No(0)
• W1 = avg weight initially
  25 * W1 = weight of 25 persons in itially
  Let weight of the man who leaves = W
  remaining 24 persons weight is = 25 W1 - W
  When new man comes in total weight = 25 W1 - W + 70
  Average weight of the new set of 25 persons = (25 W1 - W +70) / 25
  = W1 + 1 one more than previous average
  => 25W1 - W +70 = 25 W1 + 25
  => W = 45 Kg
• 8 years agoHelpfull: Yes(0) No(0)