In this task, you need to provide the correct option for a given problem on probability from the provided options.
--------
Question: Problem: 45 girls and 60 boys are present at a party . there are 17 girl - boy are in relationship among them . if a girl and a boy is selected at random , what is the probability that they will be not a couple ? 
Options: a ) 17 / 2900 , b ) 2683 / 2700 , c ) 2496 / 2700 , d ) 2369 / 2700 , e ) 198 / 270

Answer: b


Question: Problem: a letter lock consists of 3 rings each marked with 6 different letters . the number of distinct unsuccessful attempts to open the lock is at the most - . 
Options: a ) 216 , b ) 243 , c ) 215 , d ) 729 , e ) 728

Answer: c


Question: Problem: two letters from the word khantkar are selected at random . what is the probability that at least one of the selected letters is a consonant ? 
Options: a ) 25 / 28 , b ) 27 / 28 , c ) 30 / 28 , d ) 40 / 28 , e ) 50 / 28

Answer:
b