A coin is tossed twice. What is the probability of getting 2 heads.
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The probability that the coin when tossed turns up heads is 1/2. This man's 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 tail is 1/2*1/2=1/4. The probability of getting at least one head is 1-1/4=3/4.
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