Same chapter3 marksDifficulty: Medium
Three coins are tossed. Find the probability of getting at least one head.
Probability
3 marksDifficulty: Medium
Define mutually exclusive and exhaustive events, giving one example of each.
Original Khojo Papers practice question — not from a past board paper.
Answer
Two events are mutually exclusive if they cannot both occur in the same trial, as getting a head and getting a tail on one toss of a coin. A set of events is exhaustive if together they cover the whole sample space, as the six faces of a die do.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
For mutually exclusive events P(A ∩ B) = 0, so P(A ∪ B) = P(A) + P(B).
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