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

Q: Problem: kelly and chris are moving into a new city . both of them love books and thus packed several boxes with books . if chris packed 60 % of the total number of boxes , what was the ratio of the number of boxes kelly packed to the number of boxes chris packed ? 
Options: a ) 4 / 3 , b ) 2 / 3 , c ) 1 / 3 , d ) 3 / 4 , e ) 1 / 4

A: b
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Q: Problem: two numbers are in respectively 10 % and 40 % more than a third number . the ratio of the two numbers is ? 
Options: a ) 11 : 14 , b ) 7 : 9 , c ) 17 : 25 , d ) 15 : 26 , e ) 2 : 3

A: a
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Q: Problem: if 50 % of the 880 students at a certain college are enrolled in biology classes , how many students at the college are not enrolled in a biology class ? 
Options: a ) 560 , b ) 540 , c ) 520 , d ) 440 , e ) 500

A:
d
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