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The probability of getting tails on the first flip is 0.5, or 1/2.
Since each flip of a coin is independent of the others, the probability of getting tails on the second flip is also 0.5, or 1/2.
To find the probability of both events occurring together (getting tails and then getting tails), we multiply the individual probabilities:
1/2 * 1/2 = 1/4
So the probability of getting tails and then getting tails is 1/4.