Notepads Pencils Rulers
Yellow Red Green
White Blue Purple
  Orange  

Mr Smith gave each of his students a notepad, a pencil, and a ruler on the first day of school.  There were 2 different colored notepads, three different colored pencils, and two different colored rulers.  How many combination of one notepad, one rule, and onepencil can Mr. Smith make?

Is there a method other than just counting out on paper to answer problems like this.

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27 Answers

Number of combinations
= 2 x 3 x 2
= 12 possible combinations.

Please don't count it out one by one on paper.
If you do that, you will be stuck, when the questions give you 100 rulers, 200 pencils and 300 notepads.

Just multiply the options together, i.e., 100 x 200 x 300 = 6000000
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