TASK DEFINITION: In this task, you need to provide the correct option for a given problem on probability from the provided options.
PROBLEM: Problem: a question paper has 2 parts , a & b , each containing 8 questions . if a student has to choose 8 from part a & 4 from part b , in how many ways can he choose the questions ? 
Options: a ) 110 , b ) 70 , c ) 120 , d ) 130 , e ) 140

SOLUTION: b

PROBLEM: Problem: a box contains 3 red balls and 4 black balls . one by one , every ball is selected at random without replacement . what is the probability that the fourth ball selected is black ? 
Options: a ) 7 / 4 , b ) 1 / 2 , c ) 1 / 2 , d ) 5 / 8 , e ) 2 / 3

SOLUTION: a

PROBLEM: Problem: how many cubes of 3 cm edge can be cut out of a cube of 18 cm edge 
Options: a ) 36 , b ) 232 , c ) 216 , d ) 455 , e ) 363

SOLUTION:
c