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21-11-2022
Mathematics

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ofalltheweldfailuresinacertainassembly,85%of them occur in the weld metal itself, and the remaining 15% occur in the base metal. a sample of 20 weld failures is examined. a. whatistheprobabilitythatexactlyfiveofthemare base metal failures? b. whatistheprobabilitythatfewerthanfourofthem are base metal failures? c. whatistheprobabilitythatnoneofthemarebase metal failures?

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