The average weight of 8 persons is increased by 2.5 kg, When one of them whose weight is 56 kg is
replaced by a new man. The weight of the new man is :
(A) 66 kg
(B) 75 kg
(C) 76 kg
(D) 86 kg

• ans is 76 kg
  as average increased by 2.5 kg which will equally distributed in 8 parson= 2.5*8=20 kg which is incresed weight also
  
  so the wt of new man= 56+incresed wt= 56+20=76
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