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 200 stamps in a collection , 90 are foreign and 60 are more than 10 years old . if 20 stamps are both foreign and more than 10 years old , how many stamps are neither foreign nor more than 10 years old ? 
Options: a ) 50 , b ) 70 , c ) 100 , d ) 130 , e ) 150

Answer: b


Question: Problem: a student committee on academic integrity has 90 ways to select a president and vice president from a group of candidates . the same person can not be both president and vice president . how many candidates are there ? 
Options: a ) 7 , b ) 8 , c ) 9 , d ) 10 , e ) 11

Answer: d


Question: Problem: in a group of 60 people , 35 have visited iceland and 23 have visited norway . if 31 people have visited both iceland and norway , how many people have visited neither country ? 
Options: a ) 30 , b ) 31 , c ) 32 , d ) 33 , e ) 34

Answer:
d