# question 22222222222222222

I am having difficulty grasping the rationale behind utilizing variations for A and B, and combinations for C and D. The underlying logic suggests that for A and B, it doesn't matter in which order we place the banners on social media platform 1 and platform 2. On the contrary, for C and D, the question explicitly states, "how many ways we can pick which of the 8 banners to use," implying that the order does matter.

I'm curious why we didn't employ combinations for A and B, where the order doesn't matter, and variations for C and D, where the order is significant. Could you please provide some clarification on this choice of methodology?

Hey Noor,

Thank you for reaching out.

Please, refer to the following thread where a similar question is posed:

https://365datascience.com/q/43a8488618

Let me know if you need further assistance.

Kind regards,

365 Hristina