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A quality inspector selects a sample of 12 items at random from a collection of 60...

A quality inspector selects a sample of 12 items at random from a collection of 60 items, of which 18 have excellent quality, 25 have good quality, 12 have poor quality, and 5 are defective. How many possible samples of size 12 are there if 3 excellent ones are selected, 3 good ones are selected, 3 poor ones are selected and 3 defective ones are selected.

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