3 public questions tagged with this topic.
Applying the basic concept, using formula we get 3/5. Calculation gives this directly, check steps: apply rule, substitute values, simplify to get 3/5.
Ref: NCERT Mathematics Class XII — Probability
We can see that we verify 5/2 by full calculation: use standard identity, substitute, simplify step by step to reach 5/2.
Ref: NCERT Mathematics Class XII — Probability
Understanding this is easy: solving fully: apply relevant formula, put numbers, compute. Result comes as 0. Easy verification shows it satisfies condition.
Ref: NCERT Mathematics Class XII — Probability
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