In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Problem: what least no . must be subtracted from 50248 so that remaining no . is divisible by 20 ? 
Options: a ) 3 , b ) 2 , c ) 4 , d ) 8 , e ) 6
d

Problem: a box contains 8 apples , 7 of which are red . an apple is drawn from the box and its color is noted before it is eaten . this is done a total of n times , and the probability that a red apple is drawn each time is less than 0.5 . what is the smallest possible value of n ? 
Options: a ) 3 , b ) 4 , c ) 5 , d ) 6 , e ) 7
c

Problem: given that e and f are events such that p ( e ) = 25 , p ( f ) = 75 and p ( e n f ) = 75 , find p ( e | f ) and p ( f | e ) 
Options: a ) 5 , b ) 46 , c ) 52 , d ) 12 , e ) 3

e