In this task, you need to provide the correct option for a given problem from the provided options.
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Question: Problem: pencils , pens and exercise books in a shop are in the ratio of 10 : 2 : 3 . if there are 120 pencils , the number of exercise books in the shop is : 
Options: a ) 26 , b ) 36 , c ) 46 , d ) 56 , e ) 66

Answer: b


Question: Problem: in a group of 90 students , 36 are taking history , and 32 are taking statistics . if 57 students are taking history or statistics or both , then how many students are taking history but not statistics ? 
Options: a ) 9 , b ) 19 , c ) 25 , d ) 27 , e ) 31

Answer: c


Question: Problem: the present ratio of students to teachers at a certain school is 45 to 1 . if the student enrollment were to increase by 50 students and the number of teachers were to increase by 5 , the ratio of students to teachers would then be 25 to 1 . what is the present number of teachers ? 
Options: a ) 4 , b ) 8 , c ) 10 , d ) 12 , e ) 15

Answer:
a