A group of friends Tom, Teena, Dick, Tiana and Harry and Harriot, go out to a fair 300 meters from the Mc Donalds which is 5 Km away. They see a weighing machine and decide to have some fun. However, the girl refused to step on the weighing machine. So Tom, Dick and Harry way themselves in a particular order. First Tom, Dick and Harry wheigh themselves individually and then Tom and Dick, Dick and Harry, Tom and Harry and then Tom, Dick and Harry together respectively. The recorded weight for the last measure is 197 Kgs. The average of all the 7 measures is.

1. 253.29
2. 112.57
3. 140.71
4. 65.67

• 112.57
  197*4/7=112.57
• 13 years agoHelpfull: Yes(7) No(3)
• Let Tom's weight is x,Dick's weight is y and Harry's weight is z.
  Given last weighing x+y+z =197.
  Total weighing in 7 measures is x+y+z+(x+y)+(y+z)+(x+z)+(x+y+z)=4(x+y+z).
  So avg. of all 7 measures is 197*4/7 = 112.57
• 13 years agoHelpfull: Yes(3) No(0)