Permutations and Combinations?

A florist has to make a floral arrangement. She has 6 banksias, 5 wattles and 4 waratahs. All the flowers of each kind are different. In how many ways can the florist make a bunch of 10 flowers if she has to use aat least 3 of each kind?



Thanks very much in advance

Permutations and Combinations?
First put 3 of each:



3 banksias

3 wattles

3 waratahs



That means you have 9 out of 10 flowers already.



You have to choose one more, out of three types.



The answer is:



3C1 = 3.
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