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A coin is tossed thrice. Find the probabilitythat there will be at least one head​

User Mankoff
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The probability that the coin when tossed turns up heads is 1/2. This means that when the coin is tossed, the probability of tails is 1 – 1/2 = 1/2. When the coin is tossed twice, the probability of getting only tails is 1/2* 1/2 = 1/4. The probability of getting at least one heads is 1 – 1/4 = 3/4.
User Vlad Visinescu
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