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Two unbiased coins are tossed. What is probability of getting at most one tail ?

Two unbiased coins are tossed. What is probability of getting at most one tail ? Correct Answer $$\frac{{3}}{{4}}$$

Total 4 cases =
Favourable cases =
Please note we need atmost one tail, not atleast one tail.
So probability = $$\frac{{3}}{{4}}$$

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