instruction:
In this task, you need to provide the correct option for a given problem from the provided options.
question:
Problem: a 30 kg metal bar made of alloy of tin and silver lost 3 kg of its weight in the water . 10 kg of tin loses 1.375 kg in the water ; 5 kg of silver loses 0.375 kg . what is the ratio of tin to silver in the bar ? 
Options: a ) 1 / 4 , b ) 2 / 5 , c ) 1 / 2 , d ) 3 / 5 , e ) 2 / 3
answer:
e


question:
Problem: 9 log 9 ( 7 ) = ? 
Options: a ) 1 , b ) 2 , c ) 7 , d ) 4 , e ) 5
answer:
c


question:
Problem: find the fraction which has the same ratio to 2 / 13 that 5 / 34 has to 7 / 48 ? 
Options: a ) 240 / 1576 , b ) 240 / 1542 , c ) 240 / 1547 , d ) 240 / 1528 , e ) 240 / 1529
answer:

c