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Events are exhaustive if at least one of them must:
AFail
BRepeat
CCancel
DOccur
Answer & Solution
Correct answer: D. Occur
1. Exhaustive events cover the whole sample space between them.
2. So whatever the experiment gives, one of them holds.
3. At least one of them necessarily occurs.
_Source: NCERT Class 11 Mathematics, Chapter 16, Probability._
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