instruction:
In this task, you need to provide the correct option for a given problem from the provided options.
question:
Problem: find the compound ratio of ( 2 : 5 ) , ( 6 : 11 ) and ( 11 : 2 ) is 
Options: a ) 3 : 2 , b ) 2 : 1 , c ) 1 : 2 , d ) 6 : 5 , e ) 2 : 3
answer:
d


question:
Problem: in a group of 650 readers who read science fiction or literacy works or both , 250 read science fiction and 550 read literacy works . how many read both science fiction and literacy works ? 
Options: a ) 650 , b ) 250 , c ) 150 , d ) 100 , e ) 400
answer:
c


question:
Problem: ratio between two numbers is 3 : 4 and their sum is 420 . find the smaller number ? 
Options: a ) 378 , b ) 180 , c ) 820 , d ) 734 , e ) 840
answer:

b