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

[Q]: Problem: three unbiased coins are tossed . what is the probability of getting at least 2 heads ? 
Options: a ) 1 / 4 , b ) 1 / 2 , c ) 1 / 3 , d ) 1 / 8 , e ) 1 / 6
[A]: b


[Q]: Problem: a bag contains 6 white marbles and 6 black marbles . if each of 6 girls and 6 boys randomly selects and keeps a marble , what is the probability that all of the girls select the same colored marble ? 
Options: a ) 1 / 35 , b ) 1 / 10 , c ) 1 / 3 , d ) 1 / 462 , e ) 1 / 252
[A]: d


[Q]: Problem: four dice are thrown simultaneously . find the probability that all of them show the same face . 
Options: a ) 1 / 216 , b ) 1 / 215 , c ) 5 / 300 , d ) 1 / 415 , e ) 1 / 500
[A]:
a