(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.)

Question

(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.

Answer 1

a) The number of ways that Magnus can give out 20 identical stickers to 5 of his friends is 3,628,800.

b) 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, is 1,048,576.