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Significant birth defects occur at a rate of about 4 per 1000 births in human populations....

Significant birth defects occur at a rate of about 4 per 1000 births in human populations. After a nuclear accident, there were 10 defects observed in the next 1500 births. Find the probability of observing at least 10 defects in this sample if the birth defect rate had not changed after the accident.

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