Others Maths Puzzle

A vessel of capacity 2 litre has 25% alcohol and another vessel of capacity 6 litre had 40%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 ?
29% 49%
31% 71%
None of these

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Others Other Question

The avg earning of a group of persons is Rs.50 per day. The difference between the highest earning and lowest earning of any two persons of the group is Rs. 45. If these two people are excluded the avg earning of the group decreses by Rs 1. If the minimum earning of the person in the group lies between 42 and 47 and the no.of persons initially in the group was equal to a prime number , with both its digit prime. The no.of persons in the group initially was :
1. 29
2. 53
3. 31 Sridhar Rocz
Three persons A,B, C whose salaries together amount to Rs 14400, spend 80,85,75 percent of their salaries respectively.If their savings are in the ratio 8:9:20 then find the ratio of their salaries