John had a stock of 1200 books in his bookshop. He sold 75 on Monday, 56 on Tuesday, 64 on Wednesday, 78 on Thursday and 135
on Friday. What percent of the books was still not sold?

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

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

What is the value of x? enter your answer in the box.