Subject: mathqa
Question: the avg weight of a , b & c is 55 kg . if d joins the group , the avg weight of the group becomes 60 kg . if another man e who weights is 3 kg more than d replaces a , then the avgof b , c , d & e becomes 58 kg . what is the weight of a ?
Option: 
A: 75
B: 65
C: 90
D: 86
Answer: D