Unit 12 · Multi-Step Conditional Reasoning
Maths, Physics, Computing — Find the Impossible Outcome
Lesson 23 of 30
About this lesson
Four rules govern who passed Maths, Physics and Computing. One of them says passing Maths forces you to pass Computing too. Another says no one passed all three. Together, those two rules make one particular combination impossible — but which one?
Chapters
Question
In end-of-year tests, the following results were achieved by students taking Maths, Physics and Computing:
- Everyone who passed Physics also passed at least one of the other two subjects.
- No one who passed Maths failed Computing.
- No one passed all three subjects.
- No one failed all three subjects.
Which one of the following is not possible?
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