A Machine Is Set to Pump Cleanser into a Process

question 154

Multiple Choice

A machine is set to pump cleanser into a process at the rate of 7 gallons per minute. Upon inspection, it is learned that the machine actually pumps cleanser at a rate described by the uniform distribution over the interval 6.5 to 9.5 gallons per minute. Find the probability that between 7.0 gallons and 8.0 gallons are pumped during a randomly selected minute.

• A) 1
• B) 0.33
• C) 0
• D) 0.67