Solving Tree Diagram Problem - Exam Missed

  • Context: High School 
  • Thread starter Thread starter justinbaker
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Discussion Overview

The discussion revolves around a tree diagram problem related to probability, specifically focusing on the calculation of certain conditional probabilities. Participants are attempting to clarify their approaches and reasoning regarding the problem they encountered on an exam.

Discussion Character

  • Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant expresses frustration over missing a question on the exam and seeks help in understanding their mistake.
  • Another participant proposes a formula for part (b) of the problem, suggesting it involves the number of pet owners bitten by pets that are not their own.
  • A different participant suggests a conditional probability calculation based on the number of individuals bitten by their own pet.
  • Another participant questions the previous reasoning and proposes an alternative answer, indicating a potential disagreement on the correct approach.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as multiple competing views and calculations are presented without resolution.

Contextual Notes

There are unspecified variables and assumptions in the problem, particularly regarding the number of pet owners and the conditions under which bites occur, which may affect the calculations.

justinbaker
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ok so what am i doing wrong here? this was the only question i missed on my exam, and its driving me crazy...

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For (b) I'd have put (95+8-N)/100000 where N is the (unspecified) number of pet owners that are bitten by pets that are not their own and also bitten by their own pet.
 
I would have thought he would be after P(Bitten by own pet|Bitten) which would be 87/95
 
Sounds reasonable. But now I think the answer is 95/103.
 

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