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प्रश्न
An unbiased coin is tossed twice. Find the probability of getting at least one head.
बेरीज
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उत्तर
On tossing a coin twice,
Possible outcomes are {TT, HH, HT, TH}
Required outcomes are {HH, HT, TH}
Probability of getting at least one head = `3/4`
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