M men agree to purchase a gift for Rs. D. If three men drop out how much more will each have to contribute towards the purchase of the gift ?

• initial contribution = D/M
  final contribution = D/(M-3)
  Difference = D/(M-3) - D/M
  =>Difference =D[{M - (M-3)}/{M X (M-3)}]
  =>Difference= 3D/[M(M-3)]
  ~~kvs
• 10 years agoHelpfull: Yes(9) No(1)
• Money given by every member(M) is n/-
  M*n= D
  (M-3)(n+(3n/M-3)) = D
  
  So = 3n/M-3 is extra amount.
  
  Take an ex:
  
  10(100/-) =1000/-
  7(100+(300/7)=1000/-
• 10 years agoHelpfull: Yes(4) No(3)
• logically,if a group contributes for a gift and 3 of them are absent then the extra contry will be the missing country due to 3 persons divided among the present group members( 3 members excluded)..if n is each person contry and M is total members in group then extra contry will be (3n/M-3)..
• 10 years agoHelpfull: Yes(2) No(0)
• logically,if a group contributes for a gift and 3 of them are absent then the extra contry will be the missing country due to 3 persons divided among the present group members( 3 members excluded)..if n is each person contry and M is total members in group then extra contry will be (3n/M-3)..
• 10 years agoHelpfull: Yes(1) No(0)
• let each member contributes "D" rupees,so total amount contributed by M members=M*D
  SO,M*D=(M-3)*(D+X)
  MD=MD-3X-3D+MX
  3D=(M-3)*X
  X=3D/(M-3) MORE
  
• 10 years agoHelpfull: Yes(1) No(2)