In this task, you need to provide the correct option for a given problem from the provided options.
--------
Question: Problem: each factor of 210 is inscribed on its own plastic ball , and all of the balls are placed in a jar . if a ball is randomly selected from the jar , what is the probability that the ball is inscribed with a multiple of 42 ? 
Options: a ) 1 / 16 , b ) 5 / 42 , c ) 1 / 8 , d ) 3 / 16 , e ) 1 / 4

Answer: c


Question: Problem: how many of the positive factors of 25 , 15 and how many common factors are there in numbers ? 
Options: a ) 1 , b ) 2 , c ) 3 , d ) 4 , e ) 5

Answer: b


Question: Problem: mrs . evans gave a test to her freshmen economics class , which has 40 students enrolled and 30 of them answered question 1 correctly . if 29 answered question 2 correctly and 10 did not take the test then how many answered both questions correctly ? 
Options: a ) 24 , b ) 27 , c ) 29 , d ) 31 , e ) 33

Answer:
c