4 A supermarket uses two suppliers, C and D, of strawberries. Supplier C supplies 70% of the supermarket's strawberries. Strawberries are examined in a quality control inspection (QCI); 90% of the strawberries supplied by C pass QCI and 95% of the strawberries from D pass QCI. A strawberry is selected at random. a Find the probability that the strawberry passes QCI. b Given that a strawberry passes QCI, find the probability that it came from supplier D. c Ina sample of 2000 strawberries, find the expected number of strawberries that would fail QCI. C

4 A supermarket uses two suppliers, C and D, of strawberries. Supplier C supplies 70% of the supermarket's strawberries. Strawberries are examined in a quality control inspection (QCI); 90% of the strawberries supplied by C pass QCI and 95% of the strawberries from D pass QCI. A strawberry is selected at random. a Find the probability that the strawberry passes QCI. b Given that a strawberry passes QCI, find the probability that it came from supplier D. c Ina sample of 2000 strawberries, find the expected number of strawberries that would fail QCI. C

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Description: ALL number 4 please ToolsWindowHelpGoQAl_-_Book-2.pdfPage 345 of 6864 A supermarket uses two suppliers, C andD, of strawberries. Supplier C supplies70% of the supermarket's strawberries.Strawberries are examined in a qualitycontrol inspection (QCI);