GATE ME 2025 Set 1 — Question 14
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Engineering Mathematics → Probability → Axioms of Probability
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Question
If two unbiased coins are tossed, then what is the probability of having at least one head?
Correct answer
(D) 0.75
Solution
When two unbiased coins are tossed, the sample space is . The total number of outcomes is . The event 'at least one head' corresponds to the outcomes .
Number of favorable outcomes = .
Probability .
Number of favorable outcomes = .
Probability .
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