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

[Q]: Problem: a jar contains 6 black and 2 white balls . if you pick two balls at the same time , what ' s the probability that one ball is black and one is white ? 
Options: a ) 2 / 7 , b ) 5 / 7 , c ) 4 / 7 , d ) 3 / 15 , e ) 3 / 14
[A]: e


[Q]: Problem: there are 11 boys and 10 girls in a class . if three students are selected at random , in how many ways that 3 girl & 2 boys are selected ? 
Options: a ) 6600 , b ) 1300 , c ) 6780 , d ) 1976 , e ) 2448
[A]: a


[Q]: Problem: two letters from the word barkhint are selected at random . what is the probability that at least one of the selected letters is a consonant ? 
Options: a ) 30 / 28 , b ) 40 / 28 , c ) 25 / 28 , d ) 27 / 28 , e ) 32 / 28
[A]:
d