A company CEO asked the marketing research department to find the average age of consumers who bought the most profitable product made by the company.From survey data gathered two years ago,the researchers found the following table.Calculate the average age to give to the CEO. 
Definitions:
MTBF
Mean Time Between Failures, a reliability metric for products and systems that estimates the average time between operational failures.
System Reliability
The probability of a system or component performing its required functions under stated conditions for a specified period of time.
Parallel Components
Components that are designed to work alongside each other within a system, often to increase redundancy and reliability.
Cost Curves
Graphical representations that show how the cost of producing a good or service changes with changes in the production volume.
Q12: The sampling distribution of the mean will
Q39: The number of sick days taken by
Q43: A plant manager knows that the number
Q52: The = sign belongs in the null
Q65: Which of the following statements are correct?<br>A)
Q70: Decision trees are composed of nodes (circles,
Q77: The finite population correction factor is a
Q81: The mean and the variance of a
Q83: Historical data show that the average number
Q109: A group has 12 men and 4