Amanufacturing company employs two inspecting devices to sample a fraction of their output for quality control purposes. the first inspection monitor is able to accurately detect 99.0% of the defective items it receives, whereas the second is able to do so in 99.8% of the cases. assume that four defective items are produced and sent out for inspection. let x and y denote the number of items that will be identified as defective by inspecting devices 1 and 2, respectively. assume the devices are independent. determine the following. round your answers to three decimal places (e. g. 98.765).
a) fxy (x, y) b) fx (x)_ c) e(x)