Mathematics, 26.02.2020 01:22, beebeck6573
In an assembly-line production of industrial robots, gearbox assemblies can be installed in one minute each if holes have been properly drilled in the boxes and in ten minutes if the holes must be redrilled. Twenty gearboxes are in stock, 2 with improperly drilled holes. Five gearboxes must be selected from the 20 that are available for installation in the next five robots. a Find the probability that all 5 gearboxes will fit properly. b Find the mean, variance, and standard deviation of the time it takes to install these 5 gearboxes.
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