How safe is Philadelphia's "Electric Factory?

Cars are being produced by two factories, but factory I produces twice as many cars as factory II in a given?

• Cars are being produced by two factories, but factory I produces twice as many cars as factory II in a given time. Factory I is known to produce 2% defectives and factory Ii produces ...show more

• Answer:

  suppose (for convenience) that 300 cars are received, 2/3 from I .......... defective total from I 4 ........... 200 from II 1 ............100 total ... 5 ........... 300 a. 4/200 = 0.02 b. 1/100 = 0.01 c. 4/(4+1) = 0.8 d. 1/(4+1) = 0.2