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Plz help now!

 

(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.

 Mar 22, 2023
 #1
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a) Use sticks and stones. (20+5-1) choose (5-1) = 24 choose 4 = 10626.

 

b) If everybody gets one, then we only have to distribute 15 stickers, the same way. (15+5-1) choose (5-1) or 19 choose 4 = 3876. 

 

Hope it helps!

 Mar 22, 2023
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 Mar 22, 2023
 #3
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 Mar 27, 2023

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