Answer: there are 60 different outfits that the models can wear with the given pieces.
Step-by-step explanation: The principle states that if there are m ways to do one thing and n ways to do another, then there are m * n ways to do both. In this case, the designer has:
Three different tops to choose from.
Five different pants to choose from.
Four different jackets to choose from.
To find the total number of outfit combinations, multiply the number of choices for each piece:
Total outfits = (Number of tops) * (Number of pants) * (Number of jackets)
Total outfits = 3 * 5 * 4
Total outfits = 60