Answer: 24
Step-by-step explanation:
Given : Choices for album covers = 3
Choices for television commercials = 4
Choices for album posters = 2
Now , the number of different combinations he needs in order to test each album cover, television commercial, and album poster = ( Choices for album covers ) x (Choices for television commercials) x (Choices for album posters)
= 3 x 4 x 2 = 24
Hence, the number of different combinations he needs in order to test each album cover, television commercial, and album poster is 24.