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A fair coin is flipped 400 times. Let X be the number of heads resulting, find...

A fair coin is flipped 400 times. Let X be the number of heads resulting, find P[190<= X <= 200]

a) About 34%

b) About 95%

c) About 68%

d) About 25%

e) About 50%

Math   Statistics-And-Probability   
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