3 friends A,B,C went for week end party to McDonald's restaurant and there they measure there weights in some order in 7 rounds. A, B, C, AB, BC, AC, ABC. Final round measure is 155 kg, then find the average weight of all the 7 rounds?

• 4*(a+b+c)/7=4*155/7=88.57
• 13 years agoHelpfull: Yes(22) No(12)
• Its finally a easy one..haha
  (A+B+C+AB+BC+CA+ABC)/7 ...as given ABC=155
  
  so A+B+C also equal to 155 and AB+BC+CA=2ABC=(2*155)
  
  finally..(155+2*155+155)/7=88.57
• 10 years agoHelpfull: Yes(8) No(1)
• The AVg Wght For 7 Rounds Will Be (620/7)
• 13 years agoHelpfull: Yes(4) No(7)
• a+b+c+a+b+b+c+a+c+a+b+c=4(a+b+c)
  =4(155)/7
  =620/7
  =88.57kg
• 5 years agoHelpfull: Yes(0) No(0)