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How many ways can the letters in the word laughter be arranged if the g must be followed by the h?
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How many ways can the letters in the word laughter be arranged if the g must be followed by the h?

User Joe Fernandez
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1 Answer

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A pair "gh" can be placed in the word in 7 ways. The remaining 6 letters can be arranged in
6!=720 ways.

So, answering to question, there are
7\cdot720=5040 ways.
User KenEucker
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