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: the contents of a certain box consist of 48 apples and 30 kiwis . how many kiwis must be added to the box so that exactly 30 % of the pieces of fruit in the box will be apples ?
Options: a ) 90 , b ) 72 , c ) 82 , d ) 54 , e ) 65
c

Problem: in a race where 8 cars are running , the chance that car x will win is 1 / 2 , that y will win is 1 / 4 and that z will win is 1 / 3 . assuming that a dead heat is impossible , find the chance that one of them will win .
Options: a ) 1 / 140 , b ) 11 / 12 , c ) 14 / 8 , d ) 13 / 12 , e ) 57 / 120
d

Problem: positive integer y is 50 percent of 50 percent of positive integer x , and y percent of x equals 25 . what is the value of x ?
Options: a ) 25 , b ) 50 , c ) 75 , d ) 100 , e ) 125
d