In this task, you need to provide the correct option for a given problem from the provided options.
--------
Question: Problem: a jar contains a mixture of ab in the ratio 3 : 2 . when 10 l of mixture is replaced with liquid b , ratio becomes 2 : 3 . how many liters of liquid a was present in mixture initially . 
Options: a ) 18 , b ) 15 , c ) 16 , d ) 20 , e ) 25

Answer: a


Question: Problem: of the 200 stamps in a collection , 90 are foreign and 60 are more than 10 years old . if 20 stamps are both foreign and more than 10 years old , how many stamps are neither foreign nor more than 10 years old ? 
Options: a ) 50 , b ) 70 , c ) 100 , d ) 130 , e ) 150

Answer: b


Question: Problem: between 100 to 200 how many no are divisible by both 3 and 2 and 100,200 are inclusive ? 
Options: a ) 77 , b ) 78 , c ) 79 , d ) 80 , e ) 81

Answer:
c