A proofreader has a 98% chance of detecting an error in a piece of written work (other than misspellings, double words, and similar errors that are machine detected). A work contains four errors. 18. Find the probability that the proofreader will miss at least one of them 19. Show that two such proofreaders working independently have a 99.96% chance of detecting an error in a piece of written work 20. Find the probability that tw vill miss at least one error in a work 4 that contains four f(x) 1/8 1/4 3/8 1/4

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