instruction:
In this task, you need to provide the correct option for a given problem from the provided options.
question:
Problem: the sub - duplicate ratio of 9 : 25 is 
Options: a ) 4 : 3 , b ) 1 : 2 , c ) 3 : 5 , d ) 1 : 4 , e ) 2 : 3
answer:
c


question:
Problem: two vessels having volumes in the ratio 3 : 5 are filled with water and milk solutions . the ratio of milk and water in the two vessels are 2 : 3 and 3 : 1 respectively . if the contents of both the vessel are empties into a larger vessel , find the ratio of milk and water in the larger vessel . 
Options: a ) 99 : 61 , b ) 99 : 160 , c ) 61 : 160 , d ) 61 : 99 , e ) 99 : 160
answer:
a


question:
Problem: the ratio of buses to cars on river road is 1 to 10 . if there are 90 fewer buses than cars on river road , how many cars are on river road ? 
Options: a ) 50 , b ) 40 , c ) 100 , d ) 30 , e ) 20
answer:

c