SOLUTION: How many combinations of two books can be chosen from a group of four on a shelf?

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Question 723278: How many combinations of two books can be chosen from a group of four on a shelf?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
THE FIRST CHOICE CAN BE 1 OF 4.
THE SECOND CAN BE 1 OF 3.
4*3=12 ANS.