2. The area of a classroom is 20m². If the length is increased by 3m and the
the width is increased by 1m, the classroom will double in area. Determine
the new dimensions of the new classroom.

Twenty-five percent of the customers entering a grocery store between 5 p. m. and 7 p. m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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