Question: 2. Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that for the afternoon shift 10%

2. Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that for the afternoon shift 10% of all welds done will be substandard. More than 100,000 welds were completed during one afternoon shift. If Smith randomly selects a sample of 144 welds then what is the probability that he will find 18 or fewer substandard welds?

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