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Suppose 200 people are lined up side-by-side, each one holding a fair coin. Each person flips...

Suppose 200 people are lined up side-by-side, each one holding a fair coin. Each person flips their coin 64 times; every time it lands heads they step 1 meter forward, each time it lands tails they step 1 meter backward.

Use a normal approximation to answer the following question: after everyone finishes their 64 steps, approximately how many people will be standing between 4 and 8 meters behind the starting line?

(Round your answer to three decimal places. Example: if the true answer is 2/3, you should enter 0.667.)

Math   Statistics-And-Probability   
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