If a soccer team can wear either red, blue, or green jerseys and shorts, and each player must wear a jersey and shorts of the same color, how many uniform combinations are possible for one player?
Instruction: Calculate the total number of uniform combinations available for one player.
Context: This question assesses the candidate's ability to apply basic principles of combinatorics to calculate combinations.
Updated
Official answer
There are three valid outfits: red/red, blue/blue and green/green. Once the jersey color is chosen, the matching-shorts requirement fixes the shorts color, so the count is 3×1 = 3.
If the matching restriction were removed, there would be 3×3 = 9 color pairs. This is a counting problem; no probability is determined without specifying how outfits are selected.