instruction:
In this task, you need to provide the correct option for a given problem from the provided options.
question:
Problem: two vessels contains equal number of mixtures milk and water in the ratio 7 : 2 and 8 : 1 . both the mixtures are now mixed thoroughly . find the ratio of milk to water in the new mixture so obtained ? 
Options: a ) 1 : 3 , b ) 9 : 13 , c ) 5 : 1 , d ) 11 : 3 , e ) 15 : 4
answer:
c


question:
Problem: a class has a ratio of 3 : 6 : 7 of children with red hair , blonde hair and black hair respectively . if the class has 9 kids with red hair , how many kids are in the class ? 
Options: a ) 99 , b ) 48 , c ) 16 , d ) 22 , e ) 60
answer:
b


question:
Problem: how many different positive integers are factors of 64 ? 
Options: a ) 10 , b ) 12 , c ) 14 , d ) 16 , e ) 18
answer:

d