Hi, I'm a homeschooling mom, and need help both explaining (and understanding!) my son's math problem. The problem lists five things and asks you to figure out how many different ways they could be ordered. One thing I'm sure of...there MUST be an easier way than to try and list each individual option! An answer of 120 ways is given, but I don't know how they arrived at that. Thanks in advance for any assistance you can offer!

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