In this task, you need to provide the correct option for a given problem from the provided options.

Problem: sandy is younger than molly by 6 years . if their ages are in the respective ratio of 7 : 9 , how old is molly ? 
Options: a ) 21 , b ) 24 , c ) 27 , d ) 36 , e ) 45
c

Problem: if w is the set of all the integers between 35 and 64 , inclusive , that are either multiples of 3 or multiples of 2 or multiples of both , then w contains how many numbers ? 
Options: a ) 18 , b ) 19 , c ) 61 , d ) 31 , e ) 11
b

Problem: a salesman sold twice as much pears in the afternoon than in the morning . if he sold $ 450 kilograms of pears that day , how many kilograms did he sell in the afternoon ? 
Options: a ) 120 , b ) 180 , c ) 300 , d ) 280 , e ) 320

c