The average weight of 10 men is increased by 2 ½ kg when one of the men who weighs 58 kg is replaced by a new man. What is the weight of the new man?	Choose the correct choice from the following answers:
A) 80 kg
B) 83 kg
C) 70 kg
D) 75 kg
E) 85 kg

Rationale: since the average has increased by 2.5 kg , the weight of the man who stepped in must be equal to 58 + 10 x 2.5 58 + 25 = 83 kg ans : ' b '
Answer: B