A claim assigns probability 1+1/k to an event. Explain why it cannot be valid.
- Use the domain, units and sampling assumptions stated in the question.
Skills and prerequisite lessons
Working and explanation
BUILD THE REASONING
Hint 1
Describe the sample space and event sets, then count or apply a probability identity.
Hint 2
Check the probability axioms before calculating.
Worked solution
Describe the sample space and event sets, then count or apply a probability identity.
Calculate or simplify this relation.
All event probabilities must lie in [0,1].
It exceeds one, outside the allowed probability range.
Checks and common pitfalls: All event probabilities must lie in [0,1].
Reasoning checklist · self / teacher assessment
- State the relevant definition, condition or model.
- Show a valid calculation, proof or counterexample.
- Interpret the conclusion with its restrictions.
Think first. Reveal a hint when the class is ready.