I once participated in a test where the answers had to be chosen from the first 10 letters of the alphabet (A-J).

Not bothered too much about the solution, I merely answered by matching the letters with numbers 1 to 10 in strict alphabetical order. Imanaged a score of only 2/10!

I showed the result to a friend of mine who bettered the score to 5/10 with his attempt.

The same test was passed on to five more people, each who was entitled to view all previous results. All of them scored 7/10, meaning that no one was spot on.

(1)What is the probability that the next person will get 10/10 on his first try?

(2)If you were to submit a solution as contestant № VIII, which letters would you enter to ensure that you obtain full marks?

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## rocdocmac

I once participated in a test where the answers had to be chosen from the first 10 letters of the alphabet (A-J).Not bothered too much about the solution, I merely answered by matching the letters with numbers 1 to 10 in strict alphabetical order. I managed a score of only2/10!I showed the result to a friend of mine who bettered the score to5/10with his attempt.The same test was passed on to five more people, each who was entitled to view all previous results. All of them scored7/10, meaning that no one was spot on.(1)What is the probability that the next person will get 10/10 on his first try?(2)If you were to submit a solution as contestant№VIII, which letters would you enter to ensure that you obtain full marks?Here’s the score sheet for attempts I to VII:## Link to comment

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