Last answered:

18 Aug 2022

Posted on:

17 Aug 2022

1

Questions on Practice Exam Q6

Hi, I am not sure why the equation of Combination with repetition was = (n+p-1)! / p!  NOT =(n+p-1)! / p! (n-1)! as stated in the lecture and PPT. Kindly explain. Thanks.

3 answers ( 0 marked as helpful)
Instructor
Posted on:

17 Aug 2022

0

Hey Maay,

Thank you for your question!

Could you please let us know where you find the inconsistency? In the video lecture, on timestamp 6:43 - 7:07, I can see the correct formula being used, namely:
 image.png
Please, let me know if you encounter any mistakes.

Kind regards,
365 Hristina

Posted on:

17 Aug 2022

0

Thanks, Hristina for the clarification.
The answer to Q6 of practice exam used a slightly different formula for combination with repetition (attached below). image

Instructor
Posted on:

18 Aug 2022

0

Hey Maay,

Thank you for your reply!

Please, refer to this thread, where this is discussed and resolved :)

Kind regards,
365 Hristina

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