For Q1 in Quiz, it states that we are not arranging elements in variations while the definition itself states that variation is the number of ways we pick and ARRANGE a number of elements I am quite confused with the meaning; do we need the arrangement in variations or not? Also is this definition only relevant to variations with repetition or all variation types (with and without repetition)?

Hey Eslam, Thank you for reaching out! The definition of variations, as used in the lecture, is the following: "The total number of ways we can pick and arrange some elements of a given set." Compare this with the option marked as correct in the quiz: "We use variations instead of permutations when we are not arranging all elements in the sample space." This definition is applicable to both variations with and without repetition. Kind regards, 365 Hristina

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Eslam Mohamed Helmi

Last answered:

03 Jan 2023

Posted on:

31 Dec 2022

Resolved: Variation Definition

in Probability / Variations with Repetition

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Hristina Hristova

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Posted on:

03 Jan 2023

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Resolved: Variation Definition

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