Multiple choices 45/50
(Choose 1 answer)
There are 10 computers in a store. Among them, 7 are brand new and 3 are refurbished. Five computers are purchased for a student lab. They are indistinguishable, so the five computers are selected at random. How many different samples are possible?
A. 252
B. 30240
C. 21
D. 42
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