Question 2: show working out in a group of 27 people, 9 flat flute only, 12 play piano only, 4 play both instruments. a student is chosen at random. what is the probability that the person plays neither instruments?

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