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प्रश्न
A coin is tossed twice, what is the probability that at least one tail occurs?
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उत्तर
Sample space of the given experiment
S = {HH, HT, TH, TT}
∴ Total number of possible outcomes = 4 at least
Ways of getting a tail TH, HT, TT = 3
Probability of getting at least 1 tail by tossing a coin twice = `3/4`
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