instruction:
In this task, you need to provide the correct option for a given problem on probability from the provided options.
question:
Problem: three unbiased coins are tossed . what is the probability of getting 1 heads , 1 tail ? 
Options: a ) 3 / 4 , b ) 1 / 4 , c ) 3 / 8 , d ) 7 / 8 , e ) 2 / 8
answer:
e


question:
Problem: a certain junior class has 100 students and a certain senior class has 80 students . among these students , there are 6 siblings pairs each consisting of 1 junior and 1 senior . if 1 student is to be selected at random from each class , what is the probability that the 2 students selected will be a sibling pair ? 
Options: a ) 3 / 40000 , b ) 1 / 3600 , c ) 9 / 2000 , d ) 3 / 4000 , e ) 1 / 15
answer:
d


question:
Problem: what is the probability of drawn an ace or a space or both from a dew of cards . 
Options: a ) 14 / 52 , b ) 15 / 52 , c ) 16 / 52 , d ) 17 / 52 , e ) 18 / 52
answer:

c