TASK DEFINITION: In this task, you need to provide the correct option for a given problem on probability from the provided options.
PROBLEM: Problem: when fair coin is tossed 9 times find the probability of getting head at least once . 
Options: a ) 1 / 512 , b ) 511 / 512 , c ) 9 / 512 , d ) 503 / 51 , e ) 503 / 510

SOLUTION: b

PROBLEM: Problem: if a card is drawn from a well shuffled pack of cards , the probability of drawing a spade or a king is - . 
Options: a ) 2 / 10 , b ) 4 / 13 , c ) 3 / 5 , d ) 9 / 7 , e ) 1 / 4

SOLUTION: b

PROBLEM: Problem: if two integers x , y ( x > y ) are selected from - 10 to 4 ( inclusive ) , how many possible cases are there ? 
Options: a ) 150 , b ) 180 , c ) 190 , d ) 210 , e ) 105

SOLUTION:
e