instruction:
In this task, you need to provide the correct option for a given problem from the provided options.
question:
Problem: 20 balls are numbered 1 to 20 . a ball is drawn and then another ball is drawn without replacement . what is the probability that both balls have even numbers ? 
Options: a ) 7 / 30 , b ) 3 / 14 , c ) 9 / 38 , d ) 4 / 21 , e ) 5 / 26
answer:
c


question:
Problem: the ratio of pens to pencils is 5 to 6 . there are 5 more pencils than pens . how many pencils are there ? 
Options: a ) 24 , b ) 30 , c ) 36 , d ) 42 , e ) 48
answer:
b


question:
Problem: if 35 % of the 840 students at a certain college are enrolled in biology classes , how many students at the college are not enrolled in a biology class ? 
Options: a ) 546 , b ) 550 , c ) 555 , d ) 532 , e ) 515
answer:

a