Probability that a particular subject comes in my exam

[Born2Perform]

Hello,
I have an exam at july, in the oral part of it there are 5 subjects, that are choosen from a list of 7 subjects (Physics, History, Phylosophy, Art, Italian Lit., English Lit., Geology.)

Those 5 subjects are randomly picked up from a box (in which there are the 7 subjects), with 2 conditions:

- English Literature is not in the box, and always comes.
- Or comes History, or comes Phylosophy, they can't come both, but they'r both in the box. If one is extracted, and also the other is picked up, the second picked up doesn't count.

I need to know the probabilities for each in order to know which i should study less.
i know english probability to come is 1, but this thing of "or history or philo" stopped me, i can't solve it just thinking with dices and make tables,
any suggestion?

 

[cristo]

Why not study them all, apart from one of History or Philosophy (since if one of those is on the test, then the other will not be). That way you'll be able to answer all possible questions!

 

[tacman]

Hello, based on the information provided, it is not possible to accurately determine the probability of a particular subject coming in your exam. This is because the selection process is not completely random, as English Literature is guaranteed to be included and there are conditions regarding the selection of History and Philosophy. Without knowing the specific details of how these conditions are applied, it is not possible to calculate the probabilities. My suggestion would be to study all the subjects equally and focus on understanding the material rather than trying to predict which subjects will be chosen for the exam. Good luck on your exam!