In this task, you need to provide the correct option for a given problem from the provided options.
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Question: Problem: a man invests some money partly in 12 % stock at 108 and partly in 10 % stock at 60 . to obtain equal dividends from both , he must invest the money in the ratio :
Options: a ) 3 : 4 , b ) 3 : 2 , c ) 4 : 5 , d ) 16 : 15 , e ) none

Answer: b

Question: Problem: there are two positive numbers in the ratio 4 : 8 . if the larger number exceeds the smaller by 16 , then find the smaller number ?
Options: a ) 25 , b ) 20 , c ) 77 , d ) 88 , e ) 44

Answer: b

Question: Problem: on a certain farm the ratio of horses to cows is 4 : 1 . if the farm were to sell 15 horses and buy 15 cows , the ratio of horses to cows would then be 7 : 3 . after the transaction , how many more horses than cows would the farm own ?
Options: a ) 20 , b ) 40 , c ) 50 , d ) 60 , e ) 80

Answer:
d