Average age of men is increased by 5 yrs when person is 18 yrs is replaced by new person of aged 38 yrs how many men are there in that gropu

• 4 men
  
  If number of men are 'x'
  After replacing the person,total increase in age= 38-18= 20
  As this 20 years are to be averaged among 'x' men
  So number of men= 20/x =5, x=4
• 10 years agoHelpfull: Yes(3) No(0)
• Let there are x men and their average is y.
  total weight : Before x*y+38-18
  And After : x [y+5]
  x*y+20 =x[y+5]
  x*y+20 =x*y+5x
  5x= 20
  x=4 Men answer
• 9 years agoHelpfull: Yes(0) No(0)