In this task, you need to provide the correct option for a given problem from the provided options.

[EX Q]: Problem: pens , pencils and markers in a jenna ' s desk are in the ratio of 2 : 2 : 5 . if there are 10 pens , the number of markers in jenna ' s desk is : 
Options: a ) 30 , b ) 22 , c ) 20 , d ) 25 , e ) 100
[EX A]: d

[EX Q]: Problem: how many trailing zeros will be there after the rightmost non - zero digit in the value of 25 ! ( factorial 25 ) ? 
Options: a ) 25 , b ) 8 , c ) 6 , d ) 5 , e ) 2
[EX A]: c

[EX Q]: Problem: the probability that event a occurs is 0.4 , and the probability that events a and b both occur is 0.25 . if the probability that either event a or event b occurs is 0.8 , what is the probability that event b will occur ? 
Options: a ) 0.05 , b ) 0.15 , c ) 0.45 , d ) 0.5 , e ) 0.65
[EX A]:
e