If a certain coin is flipped, the probability that the coin will land heads is \frac1 2. If the coin is flipped 5 times, what is the probability that it will land heads up on the first 3 flips and not on the last 2 flips?
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A\frac{3}{5}
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B\frac{1}{2}
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C\frac{1}{5}
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D\frac{1}{8}
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E\frac{1}{32}
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正确答案: E