need help plz help

(a) Find the number of ways that Magnus can give out 20 identical stickers to 5 of his friends. (Not everyone has to get a sticker.)

(b) Find the number of ways that Magnus can give out 20 identical stickers to 5 of his friends, if every friend gets at least one sticker.

Guest Jan 19, 2023

#1**0 **

(a)

20 IDENTICAL stickers to 5 DIFFERENT friends:

[26 + 5 - 1] nCr 5 ==**142,506 ways - with no restrictions.**

(b) Same as (a) above except everybody get " at least one sticker"

(26 - 1) nCr (5 - 1) ==25 nCr 4 ==**12,650 ways**

**SOURCE: https://en.wikipedia.org/wiki/Twelvefold_way**

**{See the table at the very bottom of the page. Item #7 for (a), item #9 for (b)}**

Guest Jan 19, 2023