acoverupoze5th
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  • 12-02-2018
  • Mathematics
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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.

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Аноним Аноним
  • 12-02-2018
12 different combinations because 4 times 3 equals 12.
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