#permutations

  1. T

    Number of possible outcomes

    Suppose there is a building with 18 windows per floor. The architect says he would like to randomly select any 4 windows per floor to be toned in a different colour. However, there should remain at least 2 regular windows between any pair of toned windows. How can I calculate the number of...
  2. R

    Permutations With Repetition and other constraints

    I have a project I’ve been working on for work. I’ve been searching the internet for a similar solution for a few weeks and haven’t been able to find a close enough solution that I can modify. I’m trying to maximize the useable product off of a manufacturing machine that is 280” (inches) wide...

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