In this task, you need to provide the correct option for a given problem on probability from the provided options.
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Question: Problem: what is the probability q of randomly selecting an arrangement of the letters of the wordmediterraneanin which the first letter is e and the last letter is r ? 
Options: a ) 1 / 13 , b ) 1 / 20 , c ) 1 / 26 , d ) 1 / 50 , e ) 1 / 100

Answer: c


Question: Problem: in a bag containing 3 balls , a white ball was placed and then 1 ball was taken out at random . what is the probability that the extracted ball would turnon to be white , if all possible hypothesis concerning thecolor of theballs that initiallyin the bag were equally possible ? 
Options: a ) 2 / 3 , b ) 5 / 8 , c ) 3 / 5 , d ) 3 / 8 , e ) 4 / 9

Answer: b


Question: Problem: how many different ways can 2 students be seated in a row of 7 desks , so that there is always at least one empty desk between the students ? 
Options: a ) 2 , b ) 3 , c ) 30 , d ) 6 , e ) 12

Answer:
c