jacyliles5094 jacyliles5094

23-08-2017
Mathematics

contestada

How many ways are there to place 5 balls (red, orange, yellow, green, blue) into 3 indistinguishable urns?

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apologiabiology apologiabiology

23-08-2017

there are 3 urns

5 possible choices for first urn
4 for 2nd (because we used one for the first urn)
3 for 3rd (because we used 2 for first and 2nd urns)

so there are 5*4*3 or 60 different ways to place 5 balls into 3 indistinguisable urns

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