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

[Q]: 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
[A]: b


[Q]: Problem: what is the probability of getting a sum 9 from two throws of dice 
Options: a ) 1 / 3 , b ) 1 / 9 , c ) 1 / 12 , d ) 2 / 9 , e ) none of these
[A]: b


[Q]: Problem: what is the probability of getting sum 10 with the help of three dice ? 
Options: a ) 1 / 4 , b ) 1 / 8 , c ) 1 / 16 , d ) 1 / 24 , e ) 1 / 32
[A]:
b