Question

In how many ways can a person put 6 identical balls in 4 distinct buckets ?

Answer 1

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Answer 2

you need to see this and watch the video he does the problem-

http://www.quora.com/What-is-the-number-of-ways-to-distribute-8-identical-balls-in-3-different-boxes-none-being-empty-How-does-the-answer-change-if-the-balls-are-NOT-identical