Set up a generating function and use it to ﬁnd the number of ways in which eleven identical coins can be put in three distinct envelopes if each envelope has most six coins in it.

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The Answer of Set up a generating function and use it to ﬁnd the number of ways in which eleven identical coins can be put in three distinct envelopes if each envelope has most six coins in it.

Set Up a Generating Function and Use It to ﬁNd