In this task, you need to provide the correct option for a given problem on probability from the provided options.
One example is below.
Q: Problem: in a throw of a coin find the probability of getting a tail ? 
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 4 , d ) 2 / 5 , e ) 2 / 7
A: a
Rationale: "s = { h , t } e = { t } p ( e ) = 1 / 2 answer is a"
Q: Problem: there are 7 red balls and 5 blue balls in a jar . if 3 balls are selected from the jar , what is the probability that 3 balls selected are red balls ? 
Options: a ) 19 / 44 , b ) 5 / 44 , c ) 3 / 41 , d ) 13 / 44 , e ) 7 / 44
A:
e