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

Q: Problem: in a school 10 % of the boys are same in number as 1 / 3 th of the girls . what is the ratio of boys to the girls in the school ? 
Options: a ) 5 : 2 , b ) 2 : 3 , c ) 10 : 3 , d ) 3 : 7 , e ) 2 : 5

A: c
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Q: Problem: how many different positive integers are factors of 64 ? 
Options: a ) 10 , b ) 12 , c ) 14 , d ) 16 , e ) 18

A: d
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Q: Problem: in what ratio should a variety of rice costing rs . 7 per kg be mixed with another variety of rice costing rs . 8.75 per kg to obtain a mixture costing rs . 7.50 per kg ? 
Options: a ) 5 / 6 , b ) 5 / 2 , c ) 5 / 1 , d ) 5 / 3 , e ) 7 / 6

A:
b
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