ABCDE12345I have actually tried separating them in two and calculating the possible combinations because that the letters and also numbers separately yet I to be unsure what to usage for n and r.
You are watching: How many permutations of 5 letters
This problem depends on even if it is or not you deserve to repeat letters. If you have the right to repeat letters there are $26$ selections for every letter and $10$ choices for every digit. In together a case there are$26^5\times 10 ^5$ways.
If girlfriend can"t repeat letters then we need to arrange $5$ letter from $26$ feasible letters and also arrange $5$ number from $10$ number (the two choices are independent). In this situation there are$P(26,5)\times P(10, 5)$ways.
Thanks because that contributing response to smashville247.netematics ridge Exchange!Please be certain to answer the question. Administer details and share her research!
But avoid …Asking because that help, clarification, or responding to other answers.Making statements based upon opinion; earlier them increase with references or an individual experience.
Use smashville247.netJax to style equations. Smashville247.netJax reference.
See more: Five Surprising Similarities Between Judaism Islam And Christianity
To learn more, view our tips on writing great answers.
write-up Your price Discard
Not the price you're spring for? Browse various other questions tagged combinatorics permutations combinations or ask your very own question.
exactly how to calculate the number of possible patent plate utilizing the formula because that combinations with repetitions allowed?
site architecture / logo design © 2021 ridge Exchange Inc; user contributions license is granted under cc by-sa. Rev2021.9.24.40305