In this task, you need to provide the correct option for a given problem on probability from the provided options.
--------
Question: Problem: there are 7 books on a shelf , of which 2 are paperbacks and 5 are hardbacks . how many possible selections of 4 books from this shelf include at least one paperback ? 
Options: a ) a ) 30 , b ) b ) 45 , c ) c ) 50 , d ) d ) 55 , e ) e ) 60

Answer: a


Question: Problem: two unbiased coins are tossed . what is the probability of getting at most one head ? 
Options: a ) 2 / 3 , b ) 1 , c ) 3 / 4 , d ) 2 , e ) 1 / 2

Answer: c


Question: Problem: a card is drawn from a pack of 52 cards the probability of getting queen of club or aking of a heart ? 
Options: a ) 8 / 58 , b ) 9 / 25 , c ) 1 / 26 , d ) 6 / 25 , e ) 8 / 45

Answer:
c