PMP Formula of the Week: Random Defective Article

The quality control team raised concerns about the output quality of a specific machine used in your pilot test. You ask the team to provide quantitative data to validate their concerns. The quality control team leader reports that on average 9 of 375 articles produced by the specific machine are defective. What is the probability that an article chosen at random will be defective?

A. 3/125
B. 1/41
C. 1/9
D. 0.24

Reveal Answer

The correct answer is A.

3/125, answer A, is correct because the quality control team has identified a 9/375 chance of error. This can be mathematically simplified by reducing the fraction to its common denominator, resulting in a 3/125 chance that a randomly chosen article will be defective.

Related Resources
PMP Exam Prep Mobile App
Project Management White Papers

Related Courses
IT Project Management
Project Management Fundamentals
Project Management, Leadership, and Communication
PMP Exam Prep Boot Camp

PMP Formula of the Week Series

• PMP Formula of the Week: Forecasting a Necessary CPI
• PMP Formula of the Week: Forecasting a Necessary CPI Based on an ETC
• PMP Formula of the Week: Ahead or Behind Schedule
• PMP Formula of the Week: Point of Total Assumption
• PMP Formula of the Week: Rent, Lease or Buy?
• PMP Formula of the Week: Risky Task
• PMP Formula of the Week: Earned Value Management Methodology
• PMP Formula of the Week: Schedule Performance Index of 1
• PMP Formula of the Week: TCPI
• PMP Formula of the Week: Fixed-Price Incentive Fee Contract
• PMP Formula of the Week: S-Curve
• PMP Formula of the Week: Current Project Status
• PMP Formula of the Week: Random Defective Article

from
CERTIVIEW