The life times of interactive computer chips produced by York Semiconductor Manufacturer are normally distributed with a mean of1.4×10^6hours and a standard deviation of3×10^5hours. Compute the probability that a batch of 100 chips will contains at least 28 whose lifetimes are less than1.8×10^6hours.

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The life times of interactive computer chips produced by York Semiconductor Manufacturer are normally distributed with a mean of1.4×10^6hours and a standard deviation of3×10^5hours. Compute the probability that a batch of 100 chips will contains at least 28 whose lifetimes are less than1.8×10^6hours.

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