In this task, you need to provide the correct option for a given problem from the provided options.
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Question: Problem: of the people who responded to a market survey , 200 preferred brand x and the rest preferred brand y . if the respondents indicated a preference for brand x over brand y by ratio of 4 to 1 , how many people responded to the survey ? 
Options: a ) 80 , b ) 160 , c ) 250 , d ) 350 , e ) 480

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


Question: Problem: 13 different biology books and 8 different chemistry books lie on a shelf . in how many ways can a student pick 2 books of each type ? 
Options: a ) 80 , b ) 160 , c ) 720 , d ) 1100 , e ) 2184

Answer:
e