E 8 books on a shelf, of which 2 are paperbacks and 6 are hardbacks. how many possible selections of 4 books from this self incl
1 answer:
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Answer:
5; 10; 20.
Step-by-step explanation:
the 1st step is shown with orange colour, described on the right part; the 2d step is shown with blue colour, described on the right part of the picture.
