Exam 20: Averages

What is the average length of the five pieces shown, in inches?

Five plates are stacked and weighed. Their total weight is 415 pounds. What is the average weight of each plate, in pounds?

Find the average thickness, in inches, of several pieces of sheet metal that measure 0.313 inches, 0.267 inches, 0.417 inches, 0.135 inches, 0.547 inches, 0.226 inches, and 0.343 inches.

A welder work 5 days and makes the following each day: What is the welder's daily average?

On 7 jobs, a welder charges 3.5 hours, 9.5 hours, 4 hours, 5.5 hours, 12 hours, 8.5 hours, and 6 hours. Find the average hours billed per job.

Four welding jobs are completed using 12 pounds, 53 pounds, 7 pounds, and 24 pounds of electrodes. What is the average poundage of electrodes for the jobs?

One welded steel tank holds 275 gallons. Another holds twice as much. What is the average amount held by the tanks, in gallons?

What is the combined length, in inches, of the lines shown in the illustration? State your answer in decimal from correct to the nearest thousandth of an inch.

One welded steel tank holds 350 gallons. Another holds twice as much. What is the average amount held by the tanks, in gallons?

One welded steel tank holds 450 gallons. Another holds twice as much. What is the average amount held by the tanks, in gallons?