Question

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?

Answer 1

3*4

Answer 2

Let the 3 different kinds of boards be B1,B2,B3 and the 4 different kinds of markers be M1,M2,M3,M4.

Answer 3

(B1,M1), (B1,M2), (B1,M3), (B1,M4)
(B2,M1), (B2,M2), (B2,M3), (B2,M4)
(B3,M1), (B3,M2), (B3,M3), (B3,M4)

Answer 4

Therefore 3*4=12 kinds

Answer 5

Get it?