Hey all, was wondering if anyone was a genius at this subject and could help me out with this one part.

(13C3)(3C1)(4C3)(4C1)(4C1)

(13C1)(4C3)(12C1)(4C1)(11C1)(4C1) divide by 2.

These represent the number of possible 3 of a kind in 5-card poker. They BOTH equal 54,912 when calculated which is correct.

I have to explain WHY they both represent what they do. I’m stuck on the second one… I don’t know why you have to divide by 2.