A new crew of painters takes two times as long as an experienced crew. Together, both crews can paint the apartment in 6 hours. How many hours does it take the experienced crew to paint the apartment?

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3