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Donuts come in 30 different varieties and Catherine wants to buy a dozen . How many choices does she have? Explain this please.
#combinatory
#discrete_maths
asked
Dec 2, 2019
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Combinatory
by
teja1521
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with repetitive :
first one  30 varieties
second one  30 varieties
...
12th one  30 varieties
Ans = (30)$^{12}$
without repetitive :
first one  30 varieties
second one  29 varieties
...
12th one  (3011) varieties
Ans = 30.29.....19
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