Recent content by wiz g 99

Hmm, I thought the way you solve it would be total-repetitions and somehow I got 6P3-4C1*3P3*2P2.

A box contains six cards, two of which are identical. From this box, three cards are drawn in order without replacement and put on a table in a row. How many different arrangements can be made? The answer is 72. I've answered 6P3-4C1*3P3*2P2 to eliminate the repetitions, but 48 repetitions...