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Two examples to understand when an exercise is solved by combination with or without repetition. Complete Combinatorics Course: Combinations, Permutations and Variations... I invite you to follow me on my social networks: https://linktr.ee/matematicasprofealex _________________________________________________________________ If you want to help me so that the channel continues to grow you can: Subscribe: https://www.youtube.com/matematicaspr... Contribute to the channel with a donation: https://www.paypal.me/profeAlex Become a member of the channel: https://www.youtube.com/matematicaspr... _________________________________________________________________ Contact Business only, press: [email protected] 0:00 Greeting 0:11 Concepts you should know 0:56 First example 8:36 Second example 14:38 Practice exercises 17:20 Farewell and recommended videos