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OpenStudy (anonymous):
The cheerleading squad is making posters. They have 3 different colors of poster board and 4 different colors of markers. How many different posters can be made by using one poster board and one marker?
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OpenStudy (kc_kennylau):
3*4
OpenStudy (kc_kennylau):
Let the 3 different kinds of boards be B1,B2,B3 and the 4 different kinds of markers be M1,M2,M3,M4.
OpenStudy (kc_kennylau):
(B1,M1), (B1,M2), (B1,M3), (B1,M4) (B2,M1), (B2,M2), (B2,M3), (B2,M4) (B3,M1), (B3,M2), (B3,M3), (B3,M4)
OpenStudy (kc_kennylau):
Therefore 3*4=12 kinds
OpenStudy (kc_kennylau):
Get it?
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OpenStudy (anonymous):
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