I need help with Geometry

1. what are the missing reasons in the proof 2. it's in the second picture and 3

Ineed with number 17 i don’t get it at alll

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