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Let's find how many ways we can organize these cards with them remaining in increasing order

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We'll need to focus on the 5s in the middle as those are the duplicates, so how many ways can we order the 3 cards that are 5s?

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There are 3 choices for our first 5.

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For each of those 3 options for the first card, we have 2 left as options for the second card, so we multiply by 2

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For each of those 2 options, however, we only have a single option left for the final card.

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This can be written in shorter form by writing just 3 factorial

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And if we multiply it out, our answer is that there are 6 ways of ordering the cards