Subject: mathqa
Question: a vessel of capacity 2 litre has 25 % of alcohol and another vessel of capacity 6 litre had 30 % alcohol . the total liquid of 8 litre was poured out in a vessel of capacity 10 litre and thus the rest part of the vessel was filled with the water . what is the new concentration of mixture ?
Option: 
A: 29 % .
B: 49 % .
C: 51 % .
D: 23 % .
Answer: D