While calculating the weight of a group of men, the weight of 58 kg of one of the ember was mistakenly written as 38 kg. Due to this the average of the weights decreased by half kg. What is the number of men in the group?
A)80 B)10 C)40 D)20

• the answer is 40 because the weight difference is 20 so half is reduced for each member so total members are 40
• 4 years agoHelpfull: Yes(3) No(0)
• 40
  1/2=(58+a)-(38+a)/N
  a=18 come by eq.. 58+a/2N=38+a/N
• 4 years agoHelpfull: Yes(1) No(0)