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How many ways can you choose a set of 9 pencils from a selection of 10?

How many ways can you choose a set of 9 pencils from a selection of 10?
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How many ways can you choose a set of 9 pencils from a selection of 10?

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User Ben Bishop
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1 Answer

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{10 \choose 9} =(10!)/(9!1!)=10
answered
User Rpabon
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