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Orlov [11]
3 years ago
13

Ms Li has 4 different books and 1 red pen,1 blue pen and 1 black pen she is wrapping one book and one pen.Draw a tree diagram to

find the number of combinations she can choose.
Mathematics
1 answer:
scoray [572]3 years ago
8 0
12 different combinations because 4 times 3 equals 12.
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