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- Janet Yang

Word problems are my favorite type of math questions! I would not feel comfortable answering questions that require specialized knowledge (Physics, Statistics, etc.) because I have not studied these in depth.

I tutor students (fifth through twelfth grades) and am a Top Contributor on Yahoo!Answers with over 24,000 math solutions.

Co-author of An Outline of Scientific Writing: For Researchers With English as a Foreign Language.

I have a Bachelor's degree in Applied Mathematics from the University of California at Berkeley, and a Master of Business Administration degree from The Wharton School.

George White Elementary School. Homework Help program at the Ridgewood Public Library, Ridgewood, NJ. Individual students.

User | Date | K | C | P | Comments |
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Kenneth | 11/03/16 | 10 | 10 | 10 | Thanks for the reply! |

Kenneth | 10/30/16 | 10 | 10 | 10 | Thanks for the explanation and reply! |

Matthew | 09/18/16 | 10 | 10 | 10 | Very helpful and insightful!! Thanks a lot! |

Kenneth | 09/12/16 | 10 | 10 | 10 | |

Leslie | 09/07/16 | 10 | 10 | 10 | 10 thank you so much for answering ..... |

Your conversion factor is the speed of work, i.e., amount of time per job. men × days gives you the amount of time houses is the number of jobs so the speed of work is the number of man-days per house

195 workers × 20 days = 3,900 worker-days 3,900 worker-days × (10 hours)/day = 39,000 worker-hours The job takes 39,000 worker-hours to complete the job. W workers × 15 days × (13 hours)/day = 195W

"20 workers can paint 5 houses in 10 days." 20 workers × 10 days = 200 worker-days (200 worker-days)/(5 houses) = (40 worker-days)/house 2 houses × (40 worker-days)/house = 80 worker-days (80 worker-days)/(8

Depends on the phrasing of the question, i.e., what you're trying to solve for. Without seeing the question, I'm guessing you need to determine how long it would take a certain number of men to paint

Let the first choice be a woman. There are 5 possibilities. Choose another 3 people from the remaining 9 people. No repetition, order does't matter. Number of possibilities = 9!/(3!(9-3)!) = 9!/(3!6!)

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