Probability and Events (I don't quite understan the answer)

AI Thread Summary
Urška randomly selects two pieces of paper from a bag containing the names of her classmates: David, Niko, and Dejan. The discussion revolves around classifying events related to her selection, particularly why the event of picking a paper with David's name is considered a compound event rather than an elementary event. It is clarified that since two papers are drawn, the outcome involves multiple possibilities, thus making it a compound event. The understanding of event classification is further explored through the implications of knowing which names are not chosen. The conversation emphasizes the importance of recognizing the relationship between the selected papers to accurately categorize the events.
Matejxx1
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Homework Statement


An only child Urška puts 3 pieces of paper into a bag : on each piece of paper is written a name of one of her classmates :David,Niko,Dejan (those are the 3 names): She then randomly picks 2 pieces of paper from the bag and checks them
Match the statements on the right with the ones on the left
We have to mach the letters with the numbers

Homework Equations


none

The Attempt at a Solution


A: on one of the chosen papers is the name David
B:On one of the papers is written the name of Urška's brother
C:she pick 2 pieces of paper
D:3
E: on none of the chosen pieces of paper is the name Dejan

1:elementary event
2:experiment
3:impossible event
4:Compound event
5: numbers of possible result

and so I got
A4
B3
C2
D5
E1
What I don't understand is why is A (on one of the chosen papers is the name David ) a compound event
why can't it be an elementary event
 
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Think about picking out the first piece of paper and picking out the second. Are they different events?
 
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Well yes since the name on the first piece must be different from the second one, however I still don't quite get the answer.
 
Ah I think I got it mind telling me if this way of thinking is correct
if we pick the piece of paper with the name David, we must also check the 2nd piece to figure out if it is Niko or Dejan
However if we look E(on none of the chosen pieces of paper is the name Dejan) because we know which name was not picked up we know which two were.
 
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