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(a) While travelling abroad, I bought  identical bags of candy for  friends. How many ways can I distribute the candy to my  friends, so that each friend gets at least one bag of candy?

(b) I also bought  different postcards. How many ways can I send the postcards to my friends, so that each friend gets at least one postcard?
 

 Jan 13, 2020
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(a) There are 18 ways to distribute the candy.

 

(b) There are 212 ways to distribute the postcards. 

 Jan 14, 2020

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