Robbie is trying to simplify his summer wardrobe. He always wears a pair of shorts, a shirt, and a hat. He has:
\(3\) pairs of shorts in the colours of red, grey, and yellow
\(3\) shirts in the colours of red, white, and green
\(3\) hats in the colours of yellow, purple, and white
How many different combinations of a pair of shorts, a shirt, and a hat can he put together so that each item is of a different colour?
Theme: Data Management