What does k = in k/5.2 + 81.9 = 47.2

I’m stuck on this i don’t understand.

Answer this question, only if you know the answer. 30 points and brainliest!

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