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

[Q]: Problem: what is the probability that a two digit number selected at random will be a multiple of ' 3 ' and not a multiple of ' 5 ' ? 
Options: a ) 2 / 15 , b ) 4 / 15 , c ) 1 / 15 , d ) 4 / 90 , e ) 5 / 60
[A]: b


[Q]: Problem: two unbiased coins are tossed . what is the probability of getting two heads ? 
Options: a ) 1 / 2 , b ) 1 / 4 , c ) 2 / 3 , d ) 1 / 5 , e ) 2 / 7
[A]: b


[Q]: Problem: three 6 faced dice are thrown together . the probability that all the three show the same number on them is - . 
Options: a ) 1 / 36 , b ) 1 / 216 , c ) 1 / 48 , d ) 1 / 55 , e ) 1 / 90
[A]:
a