instruction:
In this task, you need to provide the correct option for a given problem from the provided options.
question:
Problem: a man invests some money partly in 15 % stock at 105 and partly in 8 % stock at 40 . to obtain equal dividends from both , he must invest the money in the ratio : 
Options: a ) 3 : 4 , b ) 3 : 5 , c ) 7 : 5 , d ) 16 : 15 , e ) none
answer:
c


question:
Problem: if x and y are both odd prime numbers and x < y , how many distinct positive integer q factors does 2 xy have ? 
Options: a ) 3 , b ) 4 , c ) 6 , d ) 8 , e ) 12
answer:
d


question:
Problem: if w and y are both odd prime numbers and w < y , how many distinct positive integer factors does 2 wy have ? 
Options: a ) 3 , b ) 4 , c ) 6 , d ) 8 , e ) 12
answer:

d