Four fair coins are tossed once. Calculate the probability of obtaining equal a number of heads and tails.
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The probability of getting heads on the toss of a coin is 0.5. If we consider all possible outcomes of the toss of two coins as shown, there is only one outcome of the four in which both coins have come up heads, so the probability of getting heads on both coins is 0.25. The second useful rule is the Sum Rule.
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The answer is 0.5 I think .
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